A group of narrators have narrated: We heard Ali b. Abi Talib (a.s.) in Rohbah (a city on the side of the river Khaboor, in north Syria) say – I ask those of you who heard the speech of the Prophet (s.a.w.a.) on the Day of Ghadeer to stand up for the sake of Allah.

Thirteen people stood up and testified the following: The Messenger of Allah (s.a.w.a.) informed – Do I not have more authority on the believers than they have on themselves? The people replied – Yes. O Messenger of Allah! Then the Prophet (s.a.w.a.) took the hand of Ali b. Abi Talib (a.s.) and said: Of whomsoever I am his master, this Ali is his master. O Allah! Befriend his friends and be the enemy of his enemies. O Allah! Love those who love him, and hate those who hate him. 0 Allah! Support those who support him, and disappoint those who disappoint him.
Al-Amaali v 1 p 261