Ibn 'Umar reported that the Messenger of Allah (ﷺ), Abu Bakr and 'Umar used to observe the two 'Id prayers before the sermon. (AR)
Reference (AR): Sahih Muslim 888 (AR)
In-book reference (AR): Book 8, Hadith 8 (AR)
USC-MSA web (English) reference(deprecated numbering scheme): Book 4, Hadith 1930 (AR)