مُسْنَدُ أَحْمَدَ
Musnad Ahmad 2315
Musnad of 'Abdullah bin al-'Abbas bin 'Abdul-Muttalib from the Prophet
It was narrated that Ibn 'Abbas (رضي الله عنه) said: The Messenger of Allah (ﷺ) said: "There is no one among you but he has a companion (qareen) from among the devils appointed (to accompany) him." They said: Even you, O Messenger of Allah? He said, "Yes, but Allah helped me against him and he became Muslim.”
Musnad Ahmad 2323Saheeh because of corroborating evidence, and its isnad is d