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