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