Musnad Ahmad 1107:2

Yahya ibn Adam narrated to us, Ibn al-Mubarak narrated to us, from Sa'id ibn Yazid, from Yazid ibn Abi Habib, that Abu Basrah set out from Alexandria during Ramadan. His food was brought to him, and it was said to him, "Our houses have not yet disappeared from our sight." He said, "Do you turn away from the Sunnah of the Messenger of Allah, may Allah bless him and grant him peace?" He said, "So we continued to break our fast until we reached such-and-such a place."