Oneness, Uniqueness of Allah (Tawheed)

Bukhari :: Book 9 :: Volume 93 :: Hadith 571

Narrated Abu Huraira:

Allah's Apostle said, "If Allah will, tomorrow we will encamp in Khaif Bani Kinana, the place where the pagans took the oath of Kufr (disbelief) against the Prophet. He meant Al-Muhassab. (See Hadith No. 659, Vol. 2)