Musannaf Ibn Abi Shayba 3:2674

Abu Bakr narrated to us, he said: Yahya ibn Isa narrated to us, from Ubaydah ibn Na'il, he said: I heard Ibn Umar and the daughter of Sa'd ibn Abi Waqqas saying: "Whoever among you comes to the Friday [prayer], let her perform ghusl (ritual bath)."