Sayyida Umm Salama (may Allah be pleased with her) narrates that the Prophet Muhammad (peace and blessings be upon him) said to Sayyiduna Ali (may Allah be pleased with him): "Are you not pleased that your relation to me is like that of Sayyiduna Harun (peace be upon him) to Sayyiduna Musa (peace be upon him)? However, there will be no prophet after me."