﴿ ۞ وَإِلَىٰ ثَمُودَ أَخَاهُمْ صَٰلِحًۭا ۚ قَالَ يَٰقَوْمِ ٱعْبُدُوا۟ ٱللَّهَ مَا لَكُم مِّنْ إِلَٰهٍ غَيْرُهُۥ ۖ هُوَ أَنشَأَكُم مِّنَ ٱلْأَرْضِ وَٱسْتَعْمَرَكُمْ فِيهَا فَٱسْتَغْفِرُوهُ ثُمَّ تُوبُوٓا۟ إِلَيْهِ ۚ إِنَّ رَبِّى قَرِيبٌۭ مُّجِيبٌۭ ﴾

“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. He brought you into being out of the earth, and made you thrive thereon. Ask Him, therefore, to forgive you your sins, and then turn towards Him in repentance-for, verily, my Sustainer is ever-near, responding [to the call of whoever calls unto Him]!"”

The Story of Salih and the People of Thamud Allah, the Exalted, says, و (And) This is an introduction to that which is implied, "Verily, We sent." إِلَى ثَمُودَ (to Thamud) They were a group of people who were living in cities carved from the rocks, between Tabuk and Al-Madinah (in Arabia). They lived after the people of `Ad, so Allah sent to them, أَخَاهُمْ صَـلِحاً (their brother Salih.) He (Salih) commanded them to worship Allah alone. He said to them, هُوَ أَنشَأَكُمْ مِّنَ الاٌّرْضِ (He brought you forth from the earth) This means: `He began your creation from it (the earth). From it He created your father, Adam.' وَاسْتَعْمَرَكُمْ فِيهَا (and settled you therein,) This means: `He made you prosperous in the earth. You are settled in it and you treasure it.' فَاسْتَغْفِرُوهُ (then ask forgiveness) `This is in reference to your previous sins. ' ثُمَّ تُوبُواْ إِلَيْهِ (and turn to Him in repentance.) `This is in reference to the future.' إِنَّ رَبِّى قَرِيبٌ مُّجِيبٌ (Certainly, my Lord is Near (to all by His knowledge), Responsive.) This is similar to Allah's statement, وَإِذَا سَأَلَكَ عِبَادِي عَنِّي فَإِنِّي قَرِيبٌ أُجِيبُ دَعْوَةَ الدَّاعِ إِذَا دَعَانِ (And when My servants ask you concerning Me, then (answer them), I am indeed Near (to them by My knowledge). I respond to the invocations of the supplicant when he calls on Me.) 2:186