Musannaf Ibn Abi Shaybah

Hazrat Junadah Azdi says that eight of us from the tribe of Azd came to the service of the Prophet (peace be upon him) on Friday. All of us were fasting. The Prophet (peace be upon him) had food brought and placed before us, so we said that we were fasting. He asked, "Did you fast yesterday?" We replied, "No." He asked, "Will you fast tomorrow?" We replied, "No." Then he said, "Break your fast." Then he went for the Friday prayer. When he sat on the pulpit, he asked for water and drank it. People were watching him. In fact, he wanted to show them that he (peace be upon him) did not fast on Fridays.