It is narrated from Abdullah bin Yazid Khatmi (may Allah have mercy on him) that the Messenger of Allah (ﷺ), Abu Bakr, Umar, and Uthman (may Allah be pleased with them) used to perform the Eid prayer before the sermon, until the era of Muawiyah (may Allah be pleased with him) came, and Muawiyah (may Allah be pleased with him) delivered the sermon first.
Hadith Referenceمسند الإمام الشافعي / كتاب العيدين والأضاحي والاستسقاء / 494