Hadith 244
It is narrated from Sayyidah Aisha (may Allah be pleased with her) that the Prophet Muhammad (peace and blessings be upon him) used to prefer the right side in all his affairs, even when combing his hair, putting on his shoes, and attaining purity (he liked to begin with the right side).
Hadith 245
Hazrat Qasim (may Allah have mercy on him) says that I heard Sayyida Aisha (may Allah be pleased with her) saying that the Messenger of Allah (peace and blessings be upon him) used to perform ghusl from a vessel of milk. He (peace be upon him) would take (water) with both his hands and pour it on the right side of his (head), and he would take (water) with both his hands and pour it on the left side of his (head). Then he would take water with both his hands and pour it in the middle of his head.