"Is it obligatory to perform Ghusl and limit oneself to the amount of water used by the Prophet, peace and blessings be upon him, and what if a person needs a larger amount of water for cleanliness, and would that be considered extravagance? "

"Praise be to Allah, and prayers and peace be upon the Messenger of Allah, and upon his family and companions, as follows:

It is not necessary to adhere to the amount of a Sa' for ghusl and a Mudd for wudu', but it is recommended for those for whom it suffices. It is permissible to increase when needed. The sufficient amount is what achieves full coverage of the body in ghusl and washing the parts of wudu' in wudu', provided there is no extravagance in the increase or deficiency that affects the obligation. This varies depending on the size and texture of the limbs.

And Allah knows best."