Sahih Bukhari Volume 003, Book 031, Hadith Number 165.

Narated By Ibn 'Abbas : Allah's Apostle set out for Mecca in Ramadan and he fasted, and when he reached Al-Kadid, he broke his fast and the people (with him) broke their fast too. (Abu 'Abdullah said, "Al-Kadid is a land covered with water between Usfan and Qudaid.")