Musnad Ahmad 1166:9

'Abd al-Malik ibn 'Amr and Ibn Abi Bukayr narrated to us, they said: Ibrahim ibn Nafi' narrated to us, from Ibn Abi Najih, from Mujahid, from Umm Hani', she said: "The Prophet, peace and blessings of Allah be upon him, and Maymunah performed ghusl (ritual bathing) from a single vessel, a bowl in which there was a trace of dough."