Musnad Abu Ya'la al-Mawsili 49:7

Muhammad ibn Abi Bakr al-Muqaddami narrated to us, Abu 'Amir narrated to us, from Fulayh, from Damrah ibn Sa'id, from 'Ubayd Allah ibn 'Abd Allah ibn 'Utbah, from Abu Waqid al-Laythi, who said: 'Umar asked me, "What did the Prophet of Allah, may Allah bless him and grant him peace, recite during the two 'Eids?" I said, " 'The Hour has drawn near and the moon has split' (Surah al-Qamar) and 'Qaf. By the Glorious Qur'an' (Surah Qaf)."