Surah An-Naml (The Ants), Verse 45

وَلَقَدْ اَرْسَلْنَاۤ اِلٰی ثَمُوْدَ اَخَاهُمْ صٰلِحًا اَنِ اعْبُدُوا اللّٰهَ فَاِذَا هُمْ فَرِیْقٰنِ یَخْتَصِمُوْنَ ۟

Wa laqad arsalnaaa ilaa Samooda akhaahum Saalihan ani'budul laaha fa izaa hum fareeqaani yakhtasimoon

“We sent (aforetime), to the Thamud, their brother Salih, saying, "Serve Allah": But behold, they became two factions quarrelling with each other.”

Quran 27:45 (Yusuf Ali Translation)