An-Naml 27:45

Walaqad arsalna ila thamoodaakhahum salihan ani oAAbudoo Allahafa-itha hum fareeqani yakhtasimoon

And We had certainly sent to Thamūd their brother Ṣāliḥ, [saying], "Worship Allāh," and at once they were two parties conflicting.

And We sent to Thamūd their brother SāliH saying (to them), “Worship Allah”. Then suddenly they became two groups quarrelling with each other.