حَدَّثَنَا عُثْمَانُ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا جَرِيرٌ، عَنْ عُمَارَةَ بْنِ الْقَعْقَاعِ، بِهَذَا الإِسْنَادِ قَالَ وَعَلْقَمَةُ بْنُ عُلاَثَةَ وَلَمْ يَذْكُرْ عَامِرَ بْنَ الطُّفَيْلِ وَقَالَ نَاتِئُ الْجَبْهَةِ وَلَمْ يَقُلْ نَاشِزُ ‏.‏ وَزَادَ فَقَامَ إِلَيْهِ عُمَرُ بْنُ الْخَطَّابِ - رضى الله عنه - فَقَالَ 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 ‏"‏ ‏.‏

This hadith has been narrated through another chain of transmitters and (the narrator) made a mention of elevated forehead, but he made no mention of tucked-up loin cloth and made this addition: " 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." Translation Not Available

Book Ref: Sahih Muslim Book 12 Hadith 2320
Web Ref:  Sahih Muslim Book 5 Hadith 1064 c