Narrated to me Abu al-Tahir: Ibn Wahb narrated to us, from Ibrahim ibn Sa'd, from his father, from al-A'raj, from Abu Hurayrah, that the Prophet, peace and blessings be upon him, used to recite in the dawn prayer on Friday, in the first rak'ah: "Alif Lam Mim. The revelation of the Book..." [Surah al-Sajdah], and in the second: "Has there come upon man a period of time when he was not a thing mentioned?" [Surah al-Insan].