It was reported from ‘Ubaydullāh ibn ‘Abdullāh that ‘Umar ibn al-Khaṭṭāb asked Abu Waqid al-Laythi what the Messenger of Allah (ﷺ) ﷺ used to recite in the (Eid) prayers of al-Adhā and al-Fitr. He said, "He used to recite Qāf wal-qur’ānil majeed (Sūrah Qāf) and Iqtarabat al-sā’atul wanshaqqal qamar (Sūrah al-Qamar).” Reference: Sahih Muslim 891a, Muwatta Malik.