Translation of the verse 80 from Surah Al-hijr : Number of verses 99 - - page 266 - Part 14.
And verily, the dwellers of Al-Hijr (the rocky tract) denied the Messengers.
And certainly did the companions of Thamud deny the messengers.
(15:80) The people of Al Hijr *45 also treated the Messengers as impostors
*45) AI-Hijr was the capital city of the people of Thamud, and its ruins are found near the modern city of Al-'Ula' which is to the north west of Al-Madinah, and lies on the route from AI-Madinah to Tabuk. Though the caravans had to pass through the valley of Al-Hijr, the Holy Prophet had forbidden the Muslims to stay in the valley on their journey.
When Ibn Batutah reached there in the eighth century of Hijrah on his way to Makkah, he wrote: "I have seen the buildings of Thamud hewed into red mountains; the paintings look so bright as if they have been put on only recently....and rotten bones of human beings are found in them even today." (See E.N. 57 of VII.)
Source : Al-hijr Verse 80: And certainly did the companions of Thamud deny the messengers.