Musannaf Ibn Abi Shayba 1:1620

Hushaym narrated to us, from Husayn, from Zirr, from Muslim ibn Sabra ibn al-Musayyib, from Najiyah, from his paternal aunt Furay'ah—and she was married to Hudhayfah—that she said: Hudhayfah used to perform istinja (cleaning the private parts) with water.