مُسْنَدُ أَحْمَدَ
Musnad Ahmad 3341
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) said to Jibreel: “What kept you from visiting us more than you visit us?" Then the verse was revealed: "And we (angels) descend not except by the Command of your Lord (O Muhammad (ﷺ)). To Him belongs what is before us and what is behind us, and what is between those two; and your Lord is never forgetful" (Maryam 19:64). And that answer was for Muhammad (ﷺ).
Musnad Ahmad 3365Its isnad is saheeh, al-Bukhari (3218)]