Surah An-Naml — Ayah 45 (27:45)
وَلَقَدۡ أَرۡسَلۡنَآ إِلَىٰ ثَمُودَ أَخَاهُمۡ صَٰلِحًا أَنِ ٱعۡبُدُواْ ٱللَّهَ فَإِذَا هُمۡ فَرِيقَانِ يَخۡتَصِمُونَ ٤٥
English translation (Saheeh International)
And We had certainly sent to Thamūd their brother Ṣāliḥ, [saying], "Worship Allāh," and at once they were two parties conflicting.
Brief commentary
And I sent toThamud their brother in lineage Salih (peace be upon him) saying “Worship Allah alone”, but they became two groups after his calling them: a believing group and the other disbelieving, arguing over who is on the truth.