Oneness, Uniqueness of Allah (Tawheed)

Bukhari :: Book 9 :: Volume 93 :: Hadith 581

Narrated 'Abdullah bin Abi Aufa:

Allah's Apostle said on the Day of (the battle of) the Clans, "O Allah! The Revealer of the Holy Book, The Quick Taker of Accounts! Defeat the clans and shake them."