Sayyiduna Abu Waqid al-Laythi (may Allah be pleased with him) narrates from Sayyidah Aishah (may Allah be pleased with her) that "the Messenger of Allah (peace and blessings be upon him) led the people in prayer on the day of Eid al-Fitr and Eid al-Adha. In the first rak'ah he said seven takbirs and recited Surah Qaf, and in the second rak'ah he said five takbirs and recited Surah Iqtarabat al-Sa'ah (al-Qamar)."
Hadith Referenceالمعجم الكبير للطبراني / باب الحاء / 3285