(1) باب كَيْفَ نُزُولُ الْوَحْىِ وَأَوَّلُ مَا نَزَلَ
Narrated Anas bin Malik:
Allah sent down His Divine Inspiration to His Apostle continuously and abundantly during the period preceding his death till He took him unto Him. That was the period of the greatest part of revelation; and Allah's Messenger (ﷺ) died after that.
Reference: Sahih al-Bukhari 4982
In-book reference: Book 66, Hadith 4
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 6, Book 61, Hadith 505