Abdullah bin Saba says that once, while delivering a sermon, Sayyiduna Ali (may Allah be pleased with him) said: By the One who splits the grain and creates the living being! This beard will surely be dyed with the blood of this head. The people said: O Commander of the Faithful! Tell us his name and address, we will wipe out his lineage. He said: I beseech you by Allah, do not kill anyone except my killer. The people said: When you know this, then appoint your deputy over us. He said: No, I will leave you in the same state as the Prophet (peace and blessings be upon him) left you.