It was narrated from Abu Sa'eed Al-Khudri that: The Messenger of Allah (ﷺ) said: Ghusl on Friday is obligatory for everyone who has reached the age of puberty.
It was narrated that Jabir said: The Messenger of Allah (ﷺ) said: 'Every Muslim man has to perform Ghusl one day in every seven, and that is on Friday.'