What is the method of ghusl from janabah for women?

Question:
I ask your Eminence to inform us about the method of ghusl from janabah; because some women wash the back of the head, meaning the hair, and say that it is permissible and sufficient for washing all the hair, or they wash some of the hair by letting the water penetrate the back of the hair, meaning part of it. Is this permissible? As for washing all the hair, whether the hair is tied or loose, I ask that you inform us about the method of ghusl?

Answer:
The Sunnah is for a person to perform istinja', to perform istinja' first after intercourse, then to perform wudu' for prayer, then to pour water on his head three times, then to wash the rest of his body, starting with the right side before the left side until the ghusl is completed.
And for a woman, it is sufficient if she lets water pass over her head three times; it is sufficient. Umm Salamah said: "O Messenger of Allah, I am a woman whose hair is very thick; should I unbind it for the ghusl of janabah?" And in a narration, "for the menstruating woman?" He said: If she pours three handfuls over it, it passes over all of it, so unbinding is not required. And likewise, if a man has a head, he pours water over it and does not need to unbind it.