Sahih al-Bukhari — Prophetic Commentary on the Qur'an (Tafseer of the Prophet (pbuh)) — Hadith No: 4731
Translation
Narrated Ibn `Abbas:The Prophet (ﷺ) said to Gabriel, "What prevents you from visiting us more often than you visit us now?" So there was revealed:-- 'And we (angels) descend not but by the command of your Lord. To Him belongs what is before us and what is behind us