مُسْنَدُ أَحْمَدَ
Musnad Ahmad 2146
Musnad of 'Abdullah bin al-'Abbas bin 'Abdul-Muttalib from the Prophet
It was narrated from Abu Hamzah: I heard Ibn 'Abbas (رضي الله عنه) say: The Messenger of Allah (ﷺ) passed by me when I was playing with some other boys and I hid from him behind a gate. He called me and clapped me between the shoulders, then he sent me to Mu'awiyah.
Musnad Ahmad 2150Its isnad is hasan]