Musnad Ahmad 25:1047

Aswad ibn Amir narrated to us, Sharik narrated to us, from Abu Ishaq, from Sa'id ibn Jubayr, from Ibn Abbas: "That the Prophet, peace and blessings of Allah be upon him, used to recite in the dawn prayer on Friday: 'Alif-Lam-Mim, the revelation of the Prostration' (Surah As-Sajdah), and 'Has there [not] come upon man' (Surah Al-Insan)."