Hadith 3959

قَالَ: و أَخْبَرَنِي مُحَمَّدُ بْنُ إِسْمَاعِيلَ، حَدَّثَنِي يَحْيَى بْنُ مَعِينٍ، حَدَّثَنَا عَفَّانُ، عَنْ أَبِي عَوَانَةَ، قَالَ: لَمَّا مَاتَ الْحَسَنُ الْبَصْرِيُّ اشْتَهَيْتُ كَلَامَهُ؛ فَتَتَبَّعْتُهُ عَنْ أَصْحَابِ الْحَسَنِ؛ فَأَتَيْتُ بِهِ أَبَانَ بْنَ أَبِي عَيَّاشٍ؛ فَقَرَأَهُ عَلَيَّ كُلَّهُ عَنْ الْحَسَنِ فَمَا أَسْتَحِلُّ أَنْ أَرْوِيَ عَنْهُ شَيْئًا.
Abu Awanah says: When Hasan al-Basri passed away, I desired to know his sayings. I searched for the companions of Hasan al-Basri and came to Aban ibn Abi Ayyash. He narrated to us ahadith, all of them from Hasan al-Basri. I do not consider it permissible to narrate any of them.
قَالَ أَبُو عِيسَى: قَدْ رَوَى عَنْ أَبَانَ بْنِ أَبِي عَيَّاشٍ غَيْرُ وَاحِدٍ مِنْ الأَئِمَّةِ، وَإِنْ كَانَ فِيهِ مِنْ الضَّعْفِ وَالْغَفْلَةِ مَا وَصَفَهُ أَبُو عَوَانَةَ وَغَيْرُهُ فَلا يُغْتَرُّ بِرِوَايَةِ الثِّقَاتِ عَنْ النَّاسِ لأَنَّهُ يُرْوَى عَنْ ابْنِ سِيرِينَ أنَّه قَالَ: إِنَّ الرَّجُلَ يُحَدِّثُنِي فَمَا أَتَّهِمُهُ، وَلَكِنْ أَتَّهِمُ مَنْ فَوْقَهُ.
Imam Tirmidhi says: Despite the negligence and weakness of Aban bin Abi Ayyash, many Imams have narrated from him, as Abu Awanah and others have said. So if trustworthy people narrate from him, one should not be deceived by this, because it is narrated from Ibn Sirin that a man narrates a hadith to me, so I do not accuse him, rather I accuse the narrator above him.
وَقَدْ رَوَى غَيْرُ وَاحِدٍ عَنْ إِبْرَاهِيمَ النَّخَعِيِّ، عَنْ عَلْقَمَةَ، عَنْ عَبْدِ اللَّهِ بْنِ مَسْعُودٍ أَنَّ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ كَانَ يَقْنُتُ فِي وِتْرِهِ قَبْلَ الرُّكُوعِ.
It is narrated from several people that Ibrahim Nakha'i narrates from Alqama, and Alqama narrates from Abdullah bin Mas'ud that the Prophet Muhammad (peace be upon him) used to recite Qunoot in Witr before bowing (ruku).
وَرَوَى أَبَانُ بْنُ أَبِي عَيَّاشٍ، عَنْ إِبْرَاهِيمَ النَّخَعِيِّ، عَنْ عَلْقَمَةَ، عَنْ عَبْدِ اللَّهِ بْنِ مَسْعُودٍ أَنَّ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ كَانَ يَقْنُتُ فِي وِتْرِهِ قَبْلَ الرُّكُوعِ. هَكَذَا رَوَى سُفْيَانُ الثَّوْرِيُّ عَنْ أَبَانَ بْنِ أَبِي عَيَّاشٍ.
And it is narrated from Aban ibn Abi Ayyash that the Prophet Muhammad (peace be upon him) used to recite Qunoot in Witr before bowing (ruku’). Sufyan Thawri has narrated similarly from Aban ibn Abi Ayyash.
قَالَ أَبُو عِيسَى: وَأَبَانُ بْنُ أَبِي عَيَّاشٍ، وَإِنْ كَانَ قَدْ وُصِفَ بِالْعِبَادَةِ وَالاجْتِهَادِ؛ فَهَذِهِ حَالُهُ فِي الْحَدِيثِ؛ وَالْقَوْمُ كَانُوا أَصْحَابَ حِفْظٍ فَرُبَّ رَجُلٍ وَإِنْ كَانَ صَالِحًا لا يُقِيمُ الشَّهَادَةَ، وَلا يَحْفَظُهَا؛ فَكُلُّ مَنْ كَانَ مُتَّهَمًا فِي الْحَدِيثِ بِالْكَذِبِ أَوْ كَانَ مُغَفَّلا يُخْطِئُ الْكَثِيرَ؛ فَالَّذِي اخْتَارَهُ أَكْثَرُ أَهْلِ الْحَدِيثِ مِنْ الأَئِمَّةِ أَنْ لا يُشْتَغَلَ بِالرِّوَايَةِ عَنْهُ، أَلا تَرَى أَنَّ عَبْدَ اللَّهِ بْنَ الْمُبَارَكِ حَدَّثَ عَنْ قَوْمٍ مِنْ أَهْلِ الْعِلْمِ؛ فَلَمَّا تَبَيَّنَ لَهُ أَمْرُهُمْ تَرَكَ الرِّوَايَةَ عَنْهُمْ.
Tirmidhi says: Although Aban bin Abi Ayyash is described with the qualities of worship, asceticism, and spiritual exercise, this is his condition in hadith, and the group of hadith scholars were people of memorization. Sometimes it happens that a person is pious and righteous, but he can neither testify nor remember (the narration). Therefore, according to the preferred view of the majority of the people of hadith, a narrator who is accused of lying or a heedless narrator who makes frequent mistakes, hadith will not be narrated from such narrators. Do you not see that Abdullah bin Mubarak narrated hadith from a group of scholars, but when their conditions became clear, he abandoned narrating from them?
أَخْبَرَنِي مُوسَى بْنُ حِزَامٍ قَال: سَمِعْتُ صَالِحَ بْنَ عَبْدِاللَّهِ يَقُولُ: كُنَّا عِنْدَ أَبِي مُقَاتِلٍ السَّمَرْقَنْدِيِّ؛ فَجَعَلَ يَرْوِي عَنْ عَوْنِ بْنِ أَبِي شَدَّادٍ الأَحَادِيثَ الطِّوَالَ الَّتِي كَانَ يَرْوِي فِي وَصِيَّةِ لُقْمَانَ، وَقَتْلِ سَعِيدِ بْنِ جُبَيْرٍ وَمَا أَشْبَهَ هَذِهِ الأَحَادِيثَ؛ فَقَالَ لَهُ ابْنُ أَخٍي أَبِي مُقَاتِلٍ: يَا عَمِّ! لا تَقُلْ: حَدَّثَنَا عَوْنٌ؛ فَإِنَّكَ لَمْ تَسْمَعْ هَذِهِ الأَشْيَائَ. قَالَ: يَا بُنَيَّ! هُوَ كَلامٌ حَسَنٌ.
Salih bin Abdullah Tirmidhi says: We were with Abu Muqatil Samarqandi, and he began narrating lengthy hadiths regarding the advice of Luqman, the killing of Sa'id bin Jubair, and similar things from 'Awn bin Abi Shaddad. Abu Muqatil's nephew said to him: Uncle! Do not say that 'Awn narrated hadith to us, because in reality you have not heard anything from him. He said: Son! This is good speech.
وسمعتُ الجارودَ يقولُ: كنَّا عندَ أبي معاويةَ فذُكِرَ له حديث أبي مقاتلٍ، عن سفيانَ الثوريِّ، عن الأعمشِ، عن أبي ظبيانَ، قالَ: سُئلَ علي عن كور الزنابيرِ، قالَ: لا بأسَ به هو بمنزلةِ صيدِ البحرِ. فقال أبو معاوية: ما أقولُ: إن صاحبَكم كذاب، ولكن هذا الحديث كذبٌ .
Tirmidhi says: I heard Jarud say: We were with Abu Muawiyah when the hadith of Abu Muqatil was mentioned to him, that Abu Muqatil narrated from Sufyan Thawri, and Thawri from A’mash, and A’mash from Abu Zubyan. Abu Zubyan says that Ali (may Allah be pleased with him) was asked about the hive of bees, so he said: There is no harm in it; it is like the game of the sea. Abu Muawiyah said: I will not say that your companion (meaning Abu Muqatil) is a liar, but this hadith is a lie.
وَقَدْ تَكَلَّمَ بَعْضُ أَهْلِ الْحَدِيثِ فِي قَوْمٍ مِنْ أَجِلَّةِ أَهْلِ الْعِلْمِ، وَضَعَّفُوهُمْ مِنْ قِبَلِ حِفْظِهِمْ، وَوَثَّقَهُمْ آخَرُونَ مِنْ الأَئِمَّةِ لجَلالَتِهِمْ وَصِدْقِهِمْ وَإِنْ كَانُوا قَدْ وَهِمُوا فِي بَعْضِ مَا رَوَوْا.
Some Ahl al-Hadith criticized a group of eminent scholars, declaring them weak due to deficiencies in their memory, while other Imams authenticated them because of their truthfulness and high status, even though there are some errors in their narrations.
وقَدْ تَكَلَّمَ يَحْيَى بْنُ سَعِيدٍ الْقَطَّانُ فِي مُحَمَّدِ بْنِ عَمْرٍو، ثُمَّ رَوَى عَنْهُ.
Yahya bin Saeed Al-Qattan criticized Muhammad bin Amr, then narrated from him.
حَدَّثَنَا أَبُو بَكْرٍ عَبْدُ الْقُدُّوسِ بْنُ مُحَمَّدٍ الْعَطَّارُ الْبَصْرِيُّ، حَدَّثَنَا عَلِيُّ بْنُ الْمَدِينِيِّ قَالَ: سَأَلْتُ يَحْيَى بْنَ سَعِيدٍ، عَنْ مُحَمَّدِ بْنِ عَمْرِو بْنِ عَلْقَمَةَ، قَالَ: تُرِيدُ الْعَفْوَ أَوْ تُشَدِّدُ. فَقَالَ: لا، بَلْ أُشَدِّدُ قَالَ: لَيْسَ هُوَ مِمَّنْ تُرِيدُ، كَانَ يَقُولُ: أَشْيَاخُنَا أَبُو سَلَمَةَ وَيَحْيَى بْنُ عَبْدِالرَّحْمَنِ بْنِ حَاطِبٍ.
Ali bin Al-Madini says: I asked Yahya bin Sa'id Al-Qattan about Muhammad bin Amr bin Alqama, so he said: Do you want an opinion based on leniency and forgiveness about him, or a strict one? I said: No, I want the strict opinion. He replied: He is not of the standard that you require. In narration, he used to say: Our sheikhs are Abu Salamah and Yahya bin Abdur Rahman bin Hatib.
قَالَ يَحْيَى: سَأَلْتُ مَالِكَ بْنَ أَنَسٍ عَنْ مُحَمَّدِ بْنِ عَمْرٍو فَقَالَ: فِيهِ نَحْوَ مَا قُلْتُ.
Yahya bin Saeed Al-Qattan says: I asked Malik bin Anas about Muhammad bin Amr, so Malik expressed about him in the same way as I had said.
قَالَ عَلِيٌّ: قَالَ: يَحْيَى: وَمُحَمَّدُ بْنُ عَمْرٍو أَعْلَى مِنْ سُهَيْلِ بْنِ أَبِي صَالِحٍ، وَهُوَ عِنْدِي فَوْقَ عَبْدِالرَّحْمَنِ بْنِ حَرْمَلَةَ.
Ali bin Al-Madini says: Yahya bin Saeed Al-Qattan says: Muhammad bin Amr is superior to Suhail bin Abi Salih; in my view, he holds precedence over Abdur Rahman bin Harmalah.
قَالَ عَلِيٌّ: فَقُلْتُ لِيَحْيَى: مَا رَأَيْتَ مِنْ عَبْدِ الرَّحْمَنِ بْنِ حَرْمَلَةَ؟ قَالَ: لَوْ شِئْتُ أَنْ أُلَقِّنَهُ لَفَعَلْتُ. قُلْتُ: كَانَ يُلَقَّنُ؟ قَالَ: نَعَمْ.
Ali bin Al-Madini says: I asked Yahya bin Sa'id Al-Qattan: What is your opinion about Abdur Rahman bin Harmalah? He said: If I wanted to prompt him, I could do so. I asked: Was he prompted? He said: Yes!
قَالَ عَلِيٌّ: وَلَمْ يَرْوِ يَحْيَى عَنْ شَرِيكٍ، وَلا عَنْ أَبِي بَكْرِ بْنِ عَيَّاشٍ، وَلا عَنْ الرَّبِيعِ بْنِ صَبِيحٍ، وَلا عَنْ الْمُبَارَكِ بْنِ فَضَالَةَ.
Ali bin Al-Madani says: Yahya bin Saeed Al-Qattan did not narrate from Shareek, nor from Abu Bakr bin Ayyash, nor from Rabee’ bin Subaih, nor from Mubarak bin Fadalah.
قَالَ أَبُو عِيسَى: وَإِنْ كَانَ يَحْيَى بْنُ سَعِيدٍ الْقَطَّانُ قَدْ تَرَكَ الرِّوَايَةَ عَنْ هَؤُلائِ؛ فَلَمْ يَتْرُكْ الرِّوَايَةَ عَنْهُمْ أَنَّهُ اتَّهَمَهُمْ بِالْكَذِبِ، وَلَكِنَّهُ تَرَكَهُمْ لِحَالِ حِفْظِهِمْ. وذُكِرَ عَنْ يَحْيَى بْنِ سَعِيدٍ أَنَّهُ كَانَ إِذَا رَأَى الرَّجُلَ يُحَدِّثُ عَنْ حِفْظِهِ مَرَّةً هَكَذَا وَمَرَّةً هَكَذَا، لايَثْبُتُ عَلَى رِوَايَةٍ وَاحِدَةٍ؛ تَرَكَهُ.
Tirmidhi says: Yahya bin Saeed Al-Qattan, although he abandoned narrating hadith from these people, he did not abandon them due to the accusation of lying, but only abandoned them because of the weakness of their memory.
وَقَدْ حَدَّثَ عَنْ هَؤُلائِ الَّذِينَ تَرَكَهُمْ يَحْيَى بْنُ سَعِيدٍ الْقَطَّانُ: عَبْدُ اللَّهِ بْنُ الْمُبَارَكِ، وَوَكِيعُ بْنُ الْجَرَّاحِ، وَعَبْدُالرَّحْمَنِ بْنُ مَهْدِيٍّ وَغَيْرُهُمْ مِنْ الأَئِمَّةِ.
It is narrated from Yahya bin Saeed Al-Qattan that when he saw a narrator narrating once from his memory, and another time from his book, and in both situations he did not remain consistent in a narration, then he would abandon him.
قَالَ أَبُو عِيسَى: وَهَكَذَا تَكَلَّمَ بَعْضُ أَهْلِ الْحَدِيثِ فِي سُهَيْلِ بْنِ أَبِي صَالِحٍ، وَمُحَمَّدِ بْنِ إِسْحَاقَ، وَحَمَّادِ بْنِ سَلَمَةَ، وَمُحَمَّدِ بْنِ عَجْلانَ، وَأَشْبَاهِ هَؤُلائِ مِنْ الأَئِمَّةِ إِنَّمَا تَكَلَّمُوا فِيهِمْ مِنْ قِبَلِ حِفْظِهِمْ فِي بَعْضِ مَا رَوَوْا، وَقَدْ حَدَّثَ عَنْهُمْ الأَئِمَّةُ.
And from those narrators whom Yahya al-Qattan had abandoned, Abdullah bin al-Mubarak, Waki’ bin Jarrah, Abdur Rahman bin Mahdi, and other Imams of Hadith have narrated .
حَدَّثَنَا الْحَسَنُ بْنُ عَلِيٍّ الْحُلْوَانِيُّ، أَخْبَرَنَا عَلِيُّ بْنُ الْمَدِينِيِّ، قَالَ: قَالَ لنَا سُفْيَانُ بْنُ عُيَيْنَةَ: كُنَّا نَعُدُّ سُهَيْلَ بْنَ أَبِي صَالِحٍ ثَبْتًا فِي الْحَدِيثِ.
Tirmidhi says: Similarly, some of the Ahl al-Hadith have criticized Suhail bin Abi Salih, Muhammad bin Ishaq, Hammad bin Salamah, Muhammad bin ‘Ajlan, and the Imams of Hadith of this rank. The reason for this criticism is weakness in the narration of some of their hadiths, even though other Imams have narrated from them.
حَدَّثَنَا ابْنُ أَبِي عُمَرَ قَالَ: قَالَ سُفْيَانُ بْنُ عُيَيْنَةَ: كَانَ مُحَمَّدُ بْنُ عَجْلانَ ثِقَةً مَأْمُونًا فِي الْحَدِيثِ.
It is narrated from Ali bin Al-Madini that Sufyan bin ‘Uyaynah said to us: We used to consider Suhail bin Abi Salih trustworthy in hadith.
قَالَ أَبُو عِيسَى: وَإِنَّمَا تَكَلَّمَ يَحْيَى بْنُ سَعِيدٍ الْقَطَّانُ عِنْدَنَا فِي رِوَايَةِ مُحَمَّدِ بْنِ عَجْلانَ عَنْ سَعِيدٍ الْمَقْبُرِيِّ.
Sufyan bin ‘Uyaynah says: Muhammad bin ‘Ajlan was trustworthy and reliable in hadith.
أَخْبَرَنَا أَبُو بَكْرٍ، عَنْ عَلِيِّ بْنِ عَبْدِ اللَّهِ قَالَ: قَالَ يَحْيَى بْنُ سَعِيدٍ: قَالَ مُحَمَّدُ بْنُ عَجْلانَ: أَحَادِيثُ سَعِيدٍ الْمَقْبُرِيِّ: بَعْضُهَا "سَعِيدٌ عَنْ أَبِي هُرَيْرَةَ"، وَبَعْضُهَا "سَعِيدٌ عَنْ رَجُلٍ عَنْ أَبِي هُرَيْرَةَ"؛ فَاخْتَلَطَتْ عَلَيَّ فَصَيَّرْتُهَا "عَنْ سَعِيدٍ، عَنْ أَبِي هُرَيْرَةَ"؛ فَإِنَّمَا تَكَلَّمَ يَحْيَى بْنُ سَعِيدٍ عِنْدَنَا فِي ابْنِ عَجْلانَ لِهَذَا، وَقَدْ رَوَى يَحْيَى عَنْ ابْنِ عَجْلانَ الْكَثِيرَ.
Tirmidhi says: In our view, Yahya ibn Sa'id al-Qattan has criticized Muhammad ibn 'Ajlan in his narration from Sa'id al-Maqburi. It is narrated from 'Ali ibn al-Madini that Yahya ibn Sa'id al-Qattan says: Muhammad ibn 'Ajlan says: Some of Sa'id al-Maqburi's ahadith are narrated from Abu Hurairah, and some are through a man from Abu Hurairah. Sa'id's narrations became mixed up for me, so we narrated all of them with the chain of Sa'id from Abu Hurairah. In our view, Yahya ibn Sa'id al-Qattan criticized Ibn 'Ajlan for this reason, even though Yahya ibn Sa'id al-Qattan has narrated abundantly from Ibn 'Ajlan.
قَالَ أَبُو عِيسَى: وَهَكَذَا مَنْ تَكَلَّمَ فِي ابْنِ أَبِي لَيْلَى إِنَّمَا تَكَلَّمَ فِيهِ مِنْ قِبَلِ حِفْظِهِ .
It is narrated from Ali bin Al-Madini that Yahya bin Saeed Al-Qattan says: Shu’bah narrated with the chain of Ibn Abi Layla from his brother Isa from Abdur Rahman bin Abi Layla from Abu Ayyub from the Prophet (ﷺ) regarding sneezing.
قَالَ عَلِيٌّ: قَالَ يَحْيَى بْنُ سَعِيدٍ الْقَطَّانُ: رَوَى شُعْبَةُ عَنْ ابْنِ أَبِي لَيْلَى، عَنْ أَخِيهِ عِيسَى، عَنْ عَبْدِ الرَّحْمَنِ بْنِ أَبِي لَيْلَى، عَنْ أَبِي أَيُّوبَ، عَنْ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فِي الْعُطَاسِ .
Yahya bin Saeed Al-Qattan says: Then I met Ibn Abi Layla, and he narrated to us that his brother Isa narrated to him, Isa narrated from Ibn Abi Layla, and he narrated from Ali (may Allah be pleased with him), and Ali narrated from the Prophet Muhammad (peace and blessings be upon him).
قَالَ يَحْيَى: ثُمَّ لَقِيتُ ابْنَ أَبِي لَيْلَى، فَحَدَّثَنَا عَنْ أَخِيهِ عِيسَى، عَنْ عَبْدِالرَّحْمَنِ بْنِ أَبِي لَيْلَى، عَنْ عَلِيٍّ، عَنْ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ .
Tirmidhi says: Similarly, whoever criticized Ibn Abi Layla did so only because of the weakness of his memory.
قَالَ أَبُو عِيسَى: وَيُرْوَى عَنْ ابْنِ أَبِي لَيْلَى نَحْوُ هَذَا غَيْرَ شَيْئٍ، كَانَ يَرْوِي الشَّيْئَ مَرَّةً هَكَذَا، وَمَرَّةً هَكَذَا، يُغَيِّرُ الإِسْنَادَ، وَإِنَّمَا جَاءَ هَذَا مِنْ قِبَلِ حِفْظِهِ، وَأَكْثَرُ مَنْ مَضَى مِنْ أَهْلِ الْعِلْمِ كَانُوا لايَكْتُبُونَ، وَمَنْ كَتَبَ مِنْهُمْ إِنَّمَا كَانَ يَكْتُبُ لَهُمْ بَعْدَ السَّمَاعِ.
Tirmidhi says: Many such things are narrated from Ibn Abi Layla; sometimes he narrates one thing in this way, then changes its chain of narration, and all this happened only due to weakness of memory. Most of the scholars of the previous era did not write down hadiths, and those who did write, would do so after hearing the hadith.
و سَمِعْت أَحْمَدَ بْنَ الْحَسَنِ يَقُولُ: سَمِعْتُ أَحْمَدَ بْنَ حَنْبَلٍ يَقُولُ ابْنُ أَبِي لَيْلَى لا يُحْتَجُّ بِهِ.
Tirmidhi says: I heard Ahmad bin Al-Hasan saying, he said: I heard Ahmad bin Hanbal saying: No argument shall be established from Ibn Abi Layla.
وَكَذَلِكَ مَنْ تَكَلَّمَ مِنْ أَهْلِ الْعِلْمِ فِي مُجَالِدِ بْنِ سَعِيدٍ، وَعَبْدِ اللَّهِ بْنِ لَهِيعَةَ وَغَيْرِهِمَا إِنَّمَا تَكَلَّمُوا فِيهِمْ مِنْ قِبَلِ حِفْظِهِمْ، وَكَثْرَةِ خَطَئِهِمْ، وَقَدْ رَوَى عَنْهُمْ غَيْرُ وَاحِدٍ مِنْ الأَئِمَّةِ. فَإِذَا تَفَرَّدَ أَحَدٌ مِنْ هَؤُلائِ بِحَدِيثٍ، وَلَمْ يُتَابَعْ عَلَيْهِ لَمْ يُحْتَجَّ بِهِ، كَمَا قَالَ أَحْمَدُ بْنُ حَنْبَلٍ: ابْنُ أَبِي لَيْلَى لا يُحْتَجُّ بِهِ، إِنَّمَا عَنَى إِذَا تَفَرَّدَ بِالشَّيْئِ.وَأَشَدُّ مَا يَكُونُ هَذَا إِذَا لَمْ يَحْفَظْ الإِسْنَادَ؛ فَزَادَ فِي الإِسْنَادِ أَوْ نَقَصَ أَوْ غَيَّرَ الإِسْنَادَ أَوْ جَاءَ بِمَا يَتَغَيَّرُ فِيهِ الْمَعْنَى.
Similarly, the scholars who have criticized Mujalid bin Saeed and Abdullah bin Lahi’ah and others, the reason for this is only the weakness of their memory and frequent mistakes in narration. While many Imams have narrated from them, if any of these narrators is alone in narrating a hadith and there is no corroboration for it, then it will not be considered as proof. For example, the statement of Ahmad bin Hanbal that Ibn Abi Layla is not a valid proof; Ahmad bin Hanbal means that when Ibn Abi Layla is alone in narrating something, then he is not a valid proof. And often it happens that the narrator does not remember the chains of narration, so he either omits or adds to the chain, or changes the chain, or narrates with such words that the meaning is altered.
حَدَّثَنَا إِبْرَاهِيمُ بْنُ عَبْدِ اللَّهِ بْنِ الْمُنْذِرِ الْبَاهِلِيُّ، حَدَّثَنَا يَعْلَى بْنُ عُبَيْدٍ قَالَ لَنَا سُفْيَانُ الثَّوْرِيُّ: اتَّقُوا الْكَلْبِيَّ، فَقِيلَ لَهُ: فَإِنَّكَ تَرْوِي عَنْهُ؟! قَالَ: أَنَا أَعْرِفُ صِدْقَهُ مِنْ كَذِبِهِ.
Ya'la bin Ubaid says: Sufyan Thawri told us: Avoid al-Kalbi. It was said to him: But you narrate from him. He said: I can distinguish between his truth and his lies.
Hadith Reference سنن ترمذي / کتاب العلل / 3959