﴿ وَإِلَىٰ ثَمُودَ أَخَاهُمْ صَٰلِحًۭا ۗ قَالَ يَٰقَوْمِ ٱعْبُدُوا۟ ٱللَّهَ مَا لَكُم مِّنْ إِلَٰهٍ غَيْرُهُۥ ۖ قَدْ جَآءَتْكُم بَيِّنَةٌۭ مِّن رَّبِّكُمْ ۖ هَٰذِهِۦ نَاقَةُ ٱللَّهِ لَكُمْ ءَايَةًۭ ۖ فَذَرُوهَا تَأْكُلْ فِىٓ أَرْضِ ٱللَّهِ ۖ وَلَا تَمَسُّوهَا بِسُوٓءٍۢ فَيَأْخُذَكُمْ عَذَابٌ أَلِيمٌۭ ﴾

“AND UNTO [the tribe of] Thamud [We sent] their brother salih He said: "O my people! Worship God alone: you have no deity other than Him. Clear evidence of the truth has now come unto you from your Sustainer. "This she-camel belonging to God shall be a token for you: so leave her alone to pasture on God's earth, and do her no harm, lest grievous chastisement befall you.”

Please check ayah 7:78 for complete tafsir.