Sahih Bukhari Volume 005, Book 058, Hadith Number 190.
Hadith Section/Book: Sahih Bukhari Sahih Bukhari Book 58. Merits of the Helpers in Madina (Ansaar)
Narated By Ibn 'Abbas : Allah's Apostle was inspired Divinely at the age of forty. Then he stayed in Mecca for thirteen years, and then was ordered to migrate, and he migrated to Medina and stayed there for ten years and then died.