It was narrated that Umm Salamah, the wife of the Prophet (ﷺ), said: "I said: “O Messenger of Allah, I am a woman with tightly braided hair; should I undo it when performing Ghusl from Janabah?' He said: “No it is sufficient for you to pour three handfuls of water over your body””"
SahihSahihSahih MuslimBook 1 · Hadith 242