Musnad Ahmad 30:1213

Abd al-Samad narrated to us, Ruzayq—meaning Ibn Abi Salamah—narrated to us, Abu al-Muhazzam narrated to us, from Abu Hurairah: "That the Messenger of Allah (peace and blessings of Allah be upon him) used to recite in the final Isha prayer: 'By the sky containing great stars' (Al-Buruj), and 'By the sky and the night comer' (At-Tariq)."