مُسْنَدُ أَحْمَدَ
Musnad Ahmad 2166
Musnad of 'Abdullah bin al-'Abbas bin 'Abdul-Muttalib from the Prophet
It was narrated that Ibn 'Abbas (رضي الله عنه) said: l was present on Eid with the Messenger of Allah (ﷺ), Abu Bakr, 'Umar and 'Uthman. All of them prayed before the khutbah, with no adhan and no iqamah.
Musnad Ahmad 2171Its isnad is saheeh]