I asked him and said: May I be sacrificed for you, what was the coffin of Musa? And how much was its width? He said: Three upper arms by two upper arms. I said: What was in it? He said: The staff of Musa and the tranquility. I said: And what is the tranquility? He said: The Spirit of Allah that speaks. If they were to dispute in something, it would speak to them and inform them by clarifying what they seek (to solve).