Musnad Abu Ya'la al-Mawsili 6:125

'Abd al-Wahid ibn Ghiyath Abu Bahr narrated to us, al-Harith ibn Nabhan narrated to us, 'Asim ibn Bahdalah narrated to us, from Mus'ab ibn Sa'd, from his father: That the Messenger of Allah (may Allah bless him and grant him peace) used to recite in the dawn prayer on Friday: "Alif Lam Mim Tanzil" (Surah as-Sajdah) and "Hal ata 'ala al-insan" (Surah al-Insan).