Saeed bin Musayyib (may Allah have mercy on him) narrates that once Sayyiduna Uthman (may Allah be pleased with him) set out with the intention of Hajj. When he had covered some part of the journey, someone went to Sayyiduna Ali (may Allah be pleased with him) and said that Sayyiduna Uthman (may Allah be pleased with him) has prohibited Hajj Tamattu'. Upon hearing this, Sayyiduna Ali (may Allah be pleased with him) said to his companions: "When he departs, you also set out." Thus, Sayyiduna Ali (may Allah be pleased with him) and his companions donned the Ihram for Umrah. When Sayyiduna Uthman (may Allah be pleased with him) found out, he did not say anything to Sayyiduna Ali (may Allah be pleased with him) regarding this matter. Rather, Sayyiduna Ali (may Allah be pleased with him) himself asked him, "I have heard that you prohibit Hajj Tamattu'?" He replied, "Yes!" Sayyiduna Ali (may Allah be pleased with him) asked, "Did the Prophet (peace and blessings be upon him) not perform Hajj Tamattu'?" The narrator says: I do not know what reply Sayyiduna Uthman (may Allah be pleased with him) gave him.