Volume 4, Book 54, Number 441:
Narrated Ibn Abbas:
Allah’s Apostle asked Gabriel, “Why don’t you visit us more often than you do?” Then the following
Holy Verse was revealed (in this respect):– “And we (angels) descend not but by the order of your
Lord. To Him belong what is before us and what is behind us, and what is between those two and
your Lord was never forgetful.” (19.64)