Musnad Ahmad 1153:1575

Waki’ narrated to us, Hisham narrated to us, from his father, from ‘Aisha. And he said: Aflah narrated to us, from al-Qasim, from ‘Aisha. And he said: Sufyan narrated to us, from Mansur, from Ibrahim, from al-Aswad, from ‘Aisha, who said: "I used to perform ghusl (ritual bath), I and the Messenger of Allah, may Allah bless him and grant him peace, from a single vessel." And he said in the hadith of Mansur: "And we were both in a state of janabah (major ritual impurity)."