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." (AR)
App reference (AR): Book 14, Hadith 14 (AR)
English reference (AR): Vol. 2, Book 14, Hadith 1378 (AR)
Arabic reference (AR): Book 14, Hadith 1388 (AR)