The length of recitation in prayer

It is narrated from Sayyiduna Ubadah bin al-Samit (may Allah be pleased with him) that he said: "Indeed the Messenger of Allah (peace and blessings be upon him), while on a journey, recited Surah al-Tin, 'By the fig and the olive' [Surah al-Tin: 1], in the Isha prayer."
This report is munqati' (broken) at two places in its chain; however, a supporting report (shahid) for it exists in the Sahih from the narration of Sayyiduna al-Bara' bin Azib (may Allah be pleased with them both).

Ali bin Yahya bin Khallad (may Allah have mercy on him) narrates from his paternal uncle (may Allah be pleased with him) that he said: "The Messenger of Allah (peace and blessings be upon him) used to recite Surah al-Fatihah and another surah in the first two rak'ahs (of the prayer), and only Surah al-Fatihah in the last two."
This chain is da'if (weak).

It is narrated from Sayyiduna Abdullah bin Ubayd al-Thumali and Sayyiduna al-Hajjaj bin Amir al-Thumali (may Allah be pleased with them both), (both of whom were among the Companions of the Prophet (peace and blessings be upon him)), that "they both prayed the morning prayer with Sayyiduna Umar bin al-Khattab (may Allah be pleased with him), and Sayyiduna Umar (may Allah be pleased with him) recited the surah 'When the sky is split open' [Surah al-Inshiqaq: 1] and performed the prostration of recitation found in that surah."
The chain of this athar is sahih (authentic), and it indicates that prostrating during recitation in audible prayers such as Fajr is legitimate and is the practice of Umar al-Faruq.

It is narrated from Sayyiduna Abdullah bin Tha'labah (may Allah be pleased with him) that he said: "I prayed the morning (Fajr) prayer behind Sayyiduna Umar al-Faruq (may Allah be pleased with him), and he recited Surah al-Hajj [Surah al-Hajj: 1-78] in it and performed the prostration of recitation twice during it (when the verses of prostration came)." (Sa'd bin Ibrahim said:) I asked (in surprise): "Did this really happen in the Fajr prayer?" He replied: "Yes, it was indeed the Fajr prayer."
Imam Ibn Abi Shaybah recorded this athar in al-Musannaf (3588), and its chain is sahih (authentic).

It is narrated from Sayyiduna Abu Ayyub al-Ansari (may Allah be pleased with him) that "the Prophet (peace and blessings be upon him) recited the surah 'Blessed is He in Whose Hand is the dominion' [Surah al-Mulk: 1] in the morning (Fajr) prayer."
Imam al-Harith bin Abi Usamah recorded this hadith in his Musnad; however, there is criticism of its chain because of the weakness of Muhammad bin Umar al-Waqidi and Abu Yahya al-Aslami.

It is narrated from Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) that he said: "The Messenger of Allah (peace and blessings be upon him) instructed me to recite the surah 'By the night when it covers' [Surah al-Layl: 1] and the surah 'By the sun and its brightness' [Surah al-Shams: 1] in the morning, that is, the Fajr prayer."
I (Ibn Hajar) say: The narrator named Muhammad bin Umar in the chain of this report and the one before it is in fact al-Waqidi, who has been declared matruk (abandoned) in the science of hadith.

It is narrated from Sayyiduna Amr bin Abasah (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) recited 'Say: I seek refuge in the Lord of the daybreak' [Surah al-Falaq: 1] and 'Say: I seek refuge in the Lord of mankind' [Surah al-Nas: 1] in the morning prayer, and the Messenger of Allah (peace and blessings be upon him) said: "Al-Falaq means Hell."
Imam Abu Ya'la recorded this hadith in his Musnad; its chain contains a narrator named Mughallis al-Khurasani, who is da'if (weak), so this report is weak in terms of its chain. However, other authentic hadith are narrated about reciting the Mu'awwidhatayn in the Fajr prayer.