مُسْنَدُ أَحْمَدَ
Musnad Ahmad 2276
Musnad of 'Abdullah bin al-'Abbas bin 'Abdul-Muttalib from the Prophet
It was narrated that Sa'eed bin Jubair said: I heard Ibn 'Abbas (رضي الله عنه) say: What you call al-Mufassal is al-Muhkam.[1] The Messenger of Allah (ﷺ) died when I was ten years old and I had learned al-Muhkam.
Musnad Ahmad 2283Its isnad is saheeh, al-Bukhari (5035)]