Musnad Abu Ya'la al-Mawsili 51:6

Abu Sa'id narrated to us, Abu Ahmad al-Zubayri narrated to us, Mis'ar narrated to us, from al-Walid ibn Sari', from 'Amr ibn Hurayth, who said: I heard the Prophet, peace and blessings of Allah be upon him, reciting in the Fajr [prayer]: "By the night when it departs" (At-Takwir: 17).