مُسْنَدُ أَحْمَدَ
Musnad Ahmad 3365
Musnad of 'Abdullah bin al-'Abbas bin 'Abdul-Muttalib from the Prophet
It was narrated that Ibn ‘Abbas (رضي الله عنه) said: I stayed overnight in the house of my maternal aunt Maimoonah. The Messenger of Allah (ﷺ) got up to pray at night and I got up to pray with him, and I stood on his left. And he did like this to me, he took me by the head and made me stand on his right.
Musnad Ahmad 3389lts isnad is saheeh, al-Bukhari (699)]