Sahih Bukhari
Military Expeditions led by the Prophet (pbuh) (Al-Maghaazi)
Volume: 005 / Book Number: 059 / Hadith Number: 580
Narrated Abu Huraira:
Allah's Apostle said, "If Allah makes us victorious, our encamping place will be Al-Khaif, the place where the infidels took an oath to be loyal to Heathenism (by boycotting Banu Hashim, the Prophet's folk)."