It is narrated from Saeed bin Musayyib (may Allah have mercy on him), he says: I said to Sa’d bin Malik, that is, our master Sa’d bin Abi Waqqas (may Allah be pleased with him): I want to ask you about a hadith, but I am also in awe of you. He said: Nephew! Do not do so, if you know that I have knowledge of something, then ask me and do not be afraid of me. I said: When the Messenger of Allah (peace and blessings be upon him) left our master Ali (may Allah be pleased with him) behind in Madinah on the occasion of the Battle of Tabuk, what did he say? Our master Sa’d (may Allah be pleased with him) said: When the Noble Prophet (peace and blessings be upon him) left our master Ali (may Allah be pleased with him) behind in Madinah on the occasion of the Battle of Tabuk, he (Ali) said: O Messenger of Allah! Are you leaving me behind among the children and women who stay behind? The Prophet (peace and blessings be upon him) said: Are you not pleased that your relationship to me is like that of Harun (peace be upon him) to Musa (peace be upon him)? He said: Yes, O Messenger of Allah! Upon hearing the words of the Prophet (peace and blessings be upon him), our master Ali (may Allah be pleased with him) happily and swiftly returned, as if even now I can see the dust rising from his feet. The words of the narrator Hammad are: Upon hearing this, our master Ali (may Allah be pleased with him) swiftly returned.