﴿ كَذَّبَتْ ثَمُودُ بِطَغْوَىٰهَآ ﴾

“TO [THIS] TRUTH gave the lie, in their overweening arrogance, [the tribe of] Thamud,”

(The tribe of) Thamud) the folk of Salih (denied (the Truth) in their rebellious pride) He says: their transgression led them to this.