Musnad Abu Ya'la al-Mawsili 149:127

Ibrahim narrated to us, Hammad narrated to us, from Qatadah and 'Asim al-Ahwal, from Mu'adhah al-'Adawiyyah: That 'Aishah said: "I used to perform ghusl, I and the Messenger of Allah (may Allah bless him and grant him peace), from a single vessel." 'Asim said: 'Aishah said: "So he would hasten to it before me, and I would hasten to it before him."