﴿ وَلَقَدْ أَرْسَلْنَآ إِلَىٰ ثَمُودَ أَخَاهُمْ صَٰلِحًا أَنِ ٱعْبُدُوا۟ ٱللَّهَ فَإِذَا هُمْ فَرِيقَانِ يَخْتَصِمُونَ ﴾

“AND [likewise], indeed, We sent unto [the tribe of] Thamud their brother Salih [with this message]: “Worship God alone!” and, behold, they were [split into] two factions contending with one another.”

(And We verily sent until Thamud their brother) their Prophet (Salih, saying: Worship Allah) that you should say to them: profess Allah's divine Oneness, and repent to Him from disbelief and idolatry. (And lo! they (then) became two parties) one believing and the other disbelieving, (quarrelling) regarding Religion.