It is narrated from Sayyiduna Samurah (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) used to recite in the two Eid prayers "Sabbih isma rabbika al-a'la" in the first rak'ah and "Hal ataka hadithu al-ghashiyah" in the second rak'ah.
Hadith Referenceالمعجم الكبير للطبراني / باب السين / 6748