The Messenger of Allah ﷺ said, "Every Muslim is required to bathe once every seven days, on Friday."
حدثنا بشر بن المفضل عن داود عن أبي الزبير
قال رسول الله ﷺ على كل مسلم غسل في سبعة أيام كل جمعة
Its isnad is sahih. It is transmitted by the leading scholars with the wording, "Bathing on Friday is obligatory upon every Muslim," and it will come later.