مُسْنَدُ أَحْمَدَ
Musnad Ahmad 3779
Musnad of Abdullah bin Mas'ood
It was narrated that Ibn Mas'ood (رضي الله عنه) said: The Messenger of Allah (ﷺ) said: "There is no one of you but he has appointed to him a companion from among the jinn and a companion from among the angels." They said: Even you, O Messenger of Allah? He said: "Even me, but Allah helped me against him and he became Muslim, so he does not tell me to do anything but good.”
Musnad Ahmad 3802Its isnad is saheeh, Muslim (2814)]