" There stood up 'Umar b. Khattab (Allah be pleased with him), and said: Should I not strike his neck? Upon this he said: No. Then he turned away, and Khalid the Sword of Allah stood up against him, and said: Prophet of Allah. shall I not strike off his neck? He said, No, and then said: A people would rise from his progeny who would recite the Book of Allah glibly and fluently. 'Umar said: I think he (the Holy Prophet) also said this: If I find them I would certainly kill them like Thamud."  

يَا رَسُولَ اللَّهِ أَلاَ أَضْرِبُ عُنُقَهُ قَالَ لاَ قَالَ ثُمَّ أَدْبَرَ فَقَامَ إِلَيْهِ خَالِدٌ سَيْفُ اللَّهِ فَقَالَ يَا رَسُولَ اللَّهِ أَلاَ أَضْرِبُ عُنُقَهُ قَالَ لاَ فَقَالَ إِنَّهُ سَيَخْرُجُ مِنْ ضِئْضِئِ هَذَا قَوْمٌ يَتْلُونَ كِتَابَ اللَّهِ لَيِّنًا رَطْبًا وَقَالَ قَالَ عُمَارَةُ حَسِبْتُهُ قَالَ لَئِنْ أَدْرَكْتُهُمْ لأَقْتُلَنَّهُمْ قَتْلَ ثَمُودَ