Sahih Bukhari

Narrated Abu `Uthman An-Nahdi:Mujashi (bin Mas`ud) took his brother Mujalid bin Mas`ud to the Prophet (ﷺ) and said, ""This is Mujalid and he will give a pledge of allegiance to you for migration."" The Prophet (ﷺ) said, ""There is no migration after the Conquest of Mecca, but I will take his pledge of allegiance for Islam