Musannaf Ibn Abi Shayba 1:1524

Yahya ibn Sa'id narrated to us, from 'Abd Rabbih, from Salih, that Jabir ibn Zayd said to a man who was pouring [water] over him while he was in the bathhouse, "I am in a state of major ritual impurity (junub)." He said, "Stand up and perform the ritual bath (ghusl), for nothing makes water impure."