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