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