مُسْنَدُ أَحْمَدَ
Musnad Ahmad 3283
Musnad of 'Abdullah bin al-'Abbas bin 'Abdul-Muttalib from the Prophet
It was narrated that Ibn ‘Abbas (رضي الله عنه) said: al-Fadl and I came on a donkey when The Messenger of Allah (ﷺ) was leading the people in prayer - al-Khayyat, i.e., Hammad, said: on open ground - and we passed in front of him on (the donkey) until we had passed most of the row, and he did not tell us to stop or send us back.
Musnad Ahmad 3306A saheeh: Hadeeth; this is a da'eef isnad]