مُسْنَدُ أَحْمَدَ
Musnad Ahmad 3427
Musnad of 'Abdullah bin al-'Abbas bin 'Abdul-Muttalib from the Prophet
It was narrated from Ibn 'Abbas (رضي الله عنه) that he said: I was standing beside the Messenger of Allah (ﷺ) on his left, and he brought me round and made me stand on his right.
Musnad Ahmad 3451lts isnad is saheeh]