Volume 5 · Book 59 · Hadith 306
Narrated 'Ali: The following Holy Verse:-- "These two opponents (believers and disbelievers) dispute with each other about their Lord." (22.19) was revealed concerning us.
— Sahih Bukhari, Volume 5, Book 59: Military Expeditions led by the Prophet (pbuh) (Al-Maghaazi), Hadith #306