Musannaf Ibn Abi Shayba 3:3352

5729. Sufyan ibn 'Uyaynah narrated to us, from Tawus, from his father, and from Ibrahim ibn Maysarah, from Tawus: That the Prophet, may Allah bless him and grant him peace, recited in the Eid [prayer]. One of them said: "With 'Iqtarabat' (Surah Al-Qamar)." And the other said: "With 'Qaf'."