Musnad Abu Ya'la al-Mawsili 211:3

Hadaba ibn Khalid narrated to us, Hammam narrated to us, Qatada narrated to us, from Abu Ayyub, from Juwayriya bint al-Harith, that the Messenger of Allah (peace be upon him) entered upon her while she was fasting on a Friday. He said, "Did you fast yesterday?" She said, "No." He said, "Do you intend to fast tomorrow?" She said, "No." He said, "Then break your fast."