Abdullah bin Rafa'i عبد الله بن رافع المخزومي أبو رافع · The Book on Purification

"I said: 'O Messenger of Allah! I am woman with tight braids on my head, should I undo it to perform Ghusl for Janabah? He said: 'No. It is sufficient that you only pour three scoops of water (with hands held together) over your head, then pour water over the rest of your body, to be purified.'" Or he said: "Then you will be purified."