مُسْنَدُ أَحْمَدَ
Musnad Ahmad 3333
Musnad of 'Abdullah bin al-'Abbas bin 'Abdul-Muttalib from the Prophet
It was narrated that Ibn ‘Abbas (رضي الله عنه) said: The Prophet (ﷺ) died when I was ten years old and had recently been circumcised, and I had learnt Muhkamul-Qur'an.
Musnad Ahmad 3357Its isnad is saheeh, al-Bukhari (5035)]