Ubaid bin Umair (may Allah be pleased with him) reports that once Hazrat Aisha (may Allah be pleased with her) came to know that Hazrat Abdullah bin Amr (may Allah be pleased with him) instructs women that when they perform ghusl (ritual bath), they should loosen their hair. She said, "It is astonishing about Abdullah bin Amr that he instructs women to loosen their hair while performing ghusl; why does he not instruct them to shave their heads? I and the Prophet (peace and blessings be upon him) used to perform ghusl from the same vessel of water, and I would not pour water on my head more than three times."