It is narrated from Hazrat Buraidah (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) sent two detachments towards Yemen. He appointed Hazrat Ali (may Allah be pleased with him) as the commander of one and Hazrat Khalid bin Walid (may Allah be pleased with him) as the commander of the other, and said: "When you are together, Ali will be the commander of all, and when you are separate, each will be the commander of his own detachment." So, we encountered Banu Zaid from among the people of Yemen. We fought them, and the Muslims prevailed over the polytheists. We killed the fighters and captured the children. Hazrat Ali (may Allah be pleased with him) selected one of the captive women for himself. Seeing this, Hazrat Khalid bin Walid (may Allah be pleased with him) wrote a letter to the Noble Prophet (peace and blessings be upon him) informing him of this, and sent it with me. I presented myself in the presence of the Prophet and handed over the letter. The letter was read out to the Noble Prophet (peace and blessings be upon him). I saw signs of anger on the radiant face of the Prophet. I said, "O Messenger of Allah! I seek refuge in Allah. You sent me with a man and ordered me to obey him. I have acted upon that command." The Noble Prophet (peace and blessings be upon him) said, "Do not fall into any misunderstanding regarding Ali. He is from me and I am from him, and after me, he is your beloved." (He said this sentence twice.)