It is narrated from Saeed bin Musayyib that Sayyiduna Ali (may Allah be pleased with him) and Sayyiduna Uthman (may Allah be pleased with him) met together in the valley of Usfan. Sayyiduna Uthman (may Allah be pleased with him) used to prohibit Hajj Tamattu' and 'Umrah, but Sayyiduna Ali (may Allah be pleased with him) said to him: "You want to prohibit an act which the Messenger of Allah (peace and blessings be upon him) himself performed." But he replied: "Please spare us from your statements."