Musnad Ahmad 30:2433

Yahya narrated to us, from Sufyan, who said: Sa'd ibn Ibrahim narrated to me, from al-A'raj, from Abu Hurayrah, that the Prophet, peace and blessings of Allah be upon him, used to recite in the morning prayer on Friday: "Alif-Lam-Mim. The revelation..." (Surah As-Sajdah) and "Has there [not] come upon man..." (Surah Al-Insan).