مُسْنَدُ أَحْمَدَ
Musnad Ahmad 2169
Musnad of 'Abdullah bin al-'Abbas bin 'Abdul-Muttalib from the Prophet
It was narrated that Ibn 'Abbas (رضي الله عنه) said: The Messenger of Allah (ﷺ) offered the Eid prayer with two rak'ahs, in which he did not recite anything except Ummul-Kitab (al-Fatihah); he did not add anything to it.
Musnad Ahmad 2174lts isnad is da'eef]