Ahmad b. Muhammad narrated to us. He said: Muhammad b. `Ali b. Yahya narrated to us. He said: Abu Bakr b. Nafi` narrated to us. He said: Umayya b. Khalid narrated to us. He said: Hamid b. Salama narrated to us. He said: `Ali b. Zayd narrated to us from `Ali b. al-Husayn. He said: I heard my father narrate from his father Amir al-Mu’minin `Ali b. Abi Talib narrate:

I heard the Messenger of Allah (s) say: O `Ali! You are the deputy and the Imam of my Nation. Whoever obeys you has obeyed me, and whoever disobeys you has disobeyed me.