Sayyiduna Abu Sa'id al-Khudri (may Allah be pleased with him) says that when the Messenger of Allah (peace and blessings be upon him) returned from the place of Eid prayer, he prayed two rak'ahs.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب صلاة العيدين / 6228