Musannaf Ibn Abi Shayba 1:1932

1932. Yahya narrated to us, from Mansur, from Sa’id ibn ‘Ubaydah, from Muhammad ibn Ya’ish al-Bakri, from Ibn ‘Umar: A man came to him and said, "Wipe [the khuffayn]?" ‘Abdullah said, "I enter—meaning the privy—then I come out, and I wipe over the khuff."