صحيح البخاري Sahih Bukhari كتاب الكفالة The Book of Al-Kafala
بَابُ مَنْ تَكَفَّلَ عَنْ مَيِّتٍ دَيْنًا فَلَيْسَ لَهُ أَنْ يَرْجِعَ:

(3) Chapter. He who undertakes to repay the debts of a dead person has not the right to change his mind.

2 hadith
Hadith 2295
حَدَّثَنَا أَبُو عَاصِمٍ ، عَنْ يَزِيدَ بْنِ أَبِي عُبَيْدٍ ، عَنْ سَلَمَةَ بْنِ الْأَكْوَعِ رَضِيَ اللَّهُ عَنْهُ : " أَنَّ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ أُتِيَ بِجَنَازَةٍ لِيُصَلِّيَ عَلَيْهَا ، فَقَالَ : هَلْ عَلَيْهِ مِنْ دَيْنٍ ؟ قَالُوا : لَا ، فَصَلَّى عَلَيْهِ ، ثُمَّ أُتِيَ بِجَنَازَةٍ أُخْرَى ، فَقَالَ : هَلْ عَلَيْهِ مِنْ دَيْنٍ ؟ قَالُوا : نَعَمْ ، قَالَ : صَلُّوا عَلَى صَاحِبِكُمْ " ، قَالَ أَبُو قَتَادَةَ : عَلَيَّ دَيْنُهُ يَا رَسُولَ اللَّهِ ، فَصَلَّى عَلَيْهِ .
Narrated Salama bin Al-Akwa`: A dead person was brought to the Prophet so that he might lead the funeral prayer for him. He asked, "Is he in debt?" When the people replied in the negative, he led the funeral prayer. Another dead person was brought and he asked, "Is he in debt?" They said, "Yes." He (refused to lead the prayer and) said, "Lead the prayer of your friend." Abu Qatada said, "O Allah's Apostle! I undertake to pay his debt." Allah's Apostle then led his funeral prayer.
Hadith Reference Sahih Bukhari / The Book of Al-Kafala / Hadith: 2295
Hadith Grading محدثین: أحاديث صحيح البخاريّ كلّها صحيحة
Hadith 2296
حَدَّثَنَا عَلِيُّ بْنُ عَبْدِ اللَّهِ ، حَدَّثَنَا سُفْيَانُ ، حَدَّثَنَا عَمْرٌو ، سَمِعَ مُحَمَّدَ بْنَ عَلِيٍّ ، عَنْ جَابِرِ بْنِ عَبْدِ اللَّهِ رَضِيَ اللَّهُ عَنْهُمْ ، قَالَ : قَالَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ : " لَوْ قَدْ جَاءَ مَالُ الْبَحْرَيْنِ قَدْ أَعْطَيْتُكَ هَكَذَا وَهَكَذَا وَهَكَذَا ، فَلَمْ يَجِئْ مَالُ الْبَحْرَيْنِ حَتَّى قُبِضَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ ، فَلَمَّا جَاءَ مَالُ الْبَحْرَيْنِ أَمَرَ أَبُو بَكْرٍ فَنَادَى مَنْ كَانَ لَهُ عِنْدَ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ عِدَةٌ أَوْ دَيْنٌ فَلْيَأْتِنَا ، فَأَتَيْتُهُ ، فَقُلْتُ : إِنَّ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ ، قَالَ لِي : كَذَا وَكَذَا ، فَحَثَى لِي حَثْيَةً فَعَدَدْتُهَا ، فَإِذَا هِيَ خَمْسُ مِائَةٍ ، وَقَالَ : خُذْ مِثْلَيْهَا " .
Narrated Jabir bin `Abdullah: Once the Prophet said (to me), "If the money of Bahrain comes, I will give you a certain amount of it." The Prophet had breathed his last before the money of Bahrain arrived. When the money of Bahrain reached, Abu Bakr announced, "Whoever was promised by the Prophet should come to us." I went to Abu Bakr and said, "The Prophet promised me so and so." Abu Bakr gave me a handful of coins and when I counted them, they were five-hundred in number. Abu Bakr then said, "Take twice the amount you have taken (besides).
Hadith Reference Sahih Bukhari / The Book of Al-Kafala / Hadith: 2296
Hadith Grading محدثین: أحاديث صحيح البخاريّ كلّها صحيحة