Musnad Ahmad 1153:1273

Yahya ibn Zakariyya narrated to us, my father narrated to me, from Salih al-Asadi, from al-Sha’bi, from Muhammad ibn al-Ash’ath ibn Qays, from Aisha, the Mother of the Believers, who said: "The Messenger of Allah, may Allah bless him and grant him peace, would not refrain from anything of my face while he was fasting."