Musnad Abu Ya'la al-Mawsili 150:266

Uqbah narrated to us, Yunus bin Bukayr narrated to us, Muhammad bin Ishaq narrated to us, from al-Zuhri, from Ayyub bin Bashir, from Muhammad bin Ja’far, from Urwah, from Aisha, that the Messenger of Allah (may Allah bless him and grant him peace) said during his illness: "Pour over me seven water skins from seven different wells." So they did so.