(73) باب بَدْءِ الْوَحْىِ إِلَى رَسُولِ اللَّهِ صلى الله عليه وسلم
This hadith has been narrated on the authority of 'A'isha with another chain of narrators like one transmitted by Yunus, i. e. the first thing with which the revelation was initiated with the Messenger of Allah (ﷺ) except the words:
By Allah, Allah would never humiliate you, and Khadija said: O son of my uncle! Listen to the son of your brother.
Reference: Sahih Muslim 160 b
In-book reference: Book 1, Hadith 311
USC-MSA web (English) reference(deprecated numbering scheme): Book 1, Hadith 302