Musnad Abi Ya'la 4430 — When the Messenger of Allah ﷺ intended to take

It is narrated from Sayyidah Aishah (may Allah be pleased with her): "When the Messenger of Allah (peace and blessings be upon him) intended to take the ritual bath for major impurity (ghusl al-janabah), he would first pour water over both his hands and wash them, then perform ablution just as is done for the prayer, then put both his hands into the vessel, then take them out and put them into the hair of his head, going through the roots of the hair, until, when he (peace and blessings be upon him) had moistened the skin of his head and he (peace and blessings be upon him) was satisfied that he had cleaned it well, he would pour three handfuls of water over his blessed head, and then pour water over all the rest of his body." Urwah (may Allah have mercy on him) also said, on his own account: "When the one bathing has washed both his palms, he should wash his private parts, and then perform an ablution like that for the prayer."