Musannaf Ibn Abi Shayba 1:707

707. Ibn ‘Uyaynah narrated to us, from al-Zuhri, from ‘Urwah, from ‘A’ishah, who said: The Messenger of Allah (may Allah bless him and grant him peace) used to perform ghusl from a *faraq*, and it is the *qadah* (vessel).