Sahih Muslim 1863 b
The Book on Government
Swearing Allegiance and Pledging to adhere to Islam, to engage in Jihad and to do Good, after the conquest of Makkah, and the meaning of the phrase: "There is No Hijrah (migration) after the Conquest."
It has been reported on the authority of Mujashi' b. Mas'ud who said: I brought my brother Abu Ma'bad to the Messenger of Allah (ﷺ) after the conquest of Mecca and said: Messenger of Allah, allow him to swear his pledge of migration at your hand. He said: The period of migration is over with those who had to do it (and now nobody can get this meritorious distinctions) I said: For what actions will you allow him to bind himself in oath? He said: (He can do so) for serving the cause of Islam, for fighting in the way of Allah and for fighting in the cause of virtue. Abd Uthman said: I met Abd Ma'bad and told him what I had heard from Mujashi'. He said: He has told the truth.