Musnad Ahmad 1153:1746

Waki' narrated to us, he said: Sufyan narrated to us, from Mansur, from Ibrahim, from al-Aswad, from Aisha, she said: "I used to perform ghusl (ritual bath), I and the Prophet, peace and blessings of Allah be upon him, from a single vessel, while we were both in a state of janabah (major ritual impurity)."