وَلَقَدْ اَرْسَلْنَآ اِلٰى ثَمُوْدَ اَخَاهُمْ صٰلِحًا اَنِ اعْبُدُوا اللّٰهَ فَاِذَا هُمْ فَرِيْقٰنِ يَخْتَصِمُوْنَ ( النمل: ٤٥ )
Wa laqad arsalnaaa ilaa Samoda akhaahum Saalihan ani'budul lahha fa izaa hum fareeqaani yakhtasimoon (an-Naml 27:45)
And We had certainly sent to Thamud their brother Saleh, [saying], "Worship Allah," and at once they were two parties conflicting. (An-Naml  : 45)
1 Mufti Taqi Usmani
And We sent to Thamūd their brother SāliH saying (to them), “Worship Allah”. Then suddenly they became two groups quarrelling with each other.