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.'" (IT)
App reference (IT): Book 14, Hadith 15 (IT)
English reference (IT): Vol. 2, Book 14, Hadith 1379 (IT)
Arabic reference (IT): Book 14, Hadith 1389 (IT)