Umm al-Mu'mineen Aisha Siddiqa (may Allah be pleased with her) says that when the Prophet Muhammad (peace and blessings be upon him) performed ghusl after janabah, he would use something like a vessel, etc., and take it in his hands. He would begin with the right side of his head, then (apply it) to the left side, and then rub both hands in the middle of his head.