“Umm Awn, daughter of Muhammad ibn Ja‘far ibn Abi Talib al-Hashimiyyah, also said to have been Umm Ja‘far, the wife of Muhammad ibn al-Hanafiyyah and the mother of his son Awn. She narrated from her grandmother Asma’ bint Umays, and her son Awn and Umm Isa al-Jazzar—also said to have been al-Khuza‘iyyah—narrated from her.”
In my view, the hadith is authentic, for its separate elements are established through various chains from Aishah. The four-rak‘ah prayer is reported from her in Sahih Muslim, and I have cited it in my notes on Mukhtasar al-Shama’il (no. 280). As for the two rak‘ahs before Fajr, it is authentically reported from her in al-Bukhari and elsewhere that he, peace and blessings be upon him, never omitted them. It is referenced in Sahih Abi Dawud (1179). In one version, al-Bukhari added: “Ever.”
As for prolonging the standing in the four rak‘ahs, I found a corroborating report in the hadith of Ali, worded: “He would pray four rak‘ahs before Zuhr, praying them when the sun had passed the zenith, and prolonging them.” Al-Tirmidhi transmitted it in al-Shama’il (289), through Mis‘ar ibn Kidam, from Abu Ishaq, from Asim ibn Damrah, from him. This is a good chain of transmission, provided that Mis‘ar heard it from Abu Ishaq—al-Sabi‘i—for he became confused in his later years. Al-Tirmidhi and others also transmitted it through Shu‘bah and others, from Abu Ishaq, with the same wording but without the phrase, “and prolonging them.” See al-Shama’il (nos. 281 and 289).
2706 — “He sent me to [my people]—Bahilah. I arrived among them while hungry, and found them at their food”—and in another version: “eating blood.” They took me with them and treated me honourably. They said: “Welcome, O al-Sudayy ibn Ajlan! We have heard that you have abandoned your religion for this man.” I said: “No; rather, I have believed in Allah and His Messenger,”