(Al-Ahraf) 7 : 73
وَإِلَىٰ ثَمُودَ أَخَاهُمْ صَالِحًا ۗ قَالَ يَا قَوْمِ اعْبُدُوا اللَّهَ مَا لَكُمْ مِنْ إِلَٰهٍ غَيْرُهُ ۖ قَدْ جَاءَتْكُمْ بَيِّنَةٌ مِنْ رَبِّكُمْ ۖ هَٰذِهِ نَاقَةُ اللَّهِ لَكُمْ آيَةً ۖ فَذَرُوهَا تَأْكُلْ فِي أَرْضِ اللَّهِ ۖ وَلَا تَمَسُّوهَا بِسُوءٍ فَيَأْخُذَكُمْ عَذَابٌ أَلِيمٌ
And into Thamood their brother Swalih, He said: "Oh my people! You serve Lord Allah alone! You have no Deity besides Him, surely Explanation has come to you from your Lord: This camel of Allah is a Sign for you, so you leave it for eating in Allah’s Earth, and you shouldn't even touch her with evil intention; if so, you will be seized with a painful punishment.
Messenger Swalih was appointed to the people of Thamud. It is a place between Medina and Tabuk. See explanation 6: 123-124 and 17: 59.