Abdullah bin Shaqiq (may Allah have mercy on him) says that Sayyiduna Uthman Ghani (may Allah be pleased with him) used to prevent people from performing Hajj Tamattu', and Sayyiduna Ali (may Allah be pleased with him) used to give the fatwa of its permissibility. On one occasion, Sayyiduna Uthman (may Allah be pleased with him) must have said something to him, so Sayyiduna Ali (may Allah be pleased with him) said: "Do you even know that we performed Hajj Tamattu' with the Prophet (peace and blessings be upon him), yet you prevent it?" Sayyiduna Uthman (may Allah be pleased with him) said: "What you say is correct, but we fear (that people will go to their wives at night and in the morning will be wet from the water of janabah bath and will enter into the state of ihram for Hajj)."