Umara bin Qaqa reported,

With this chain of narration, he said, "And Alqama bin Ulatha," and he did not mention Amir bin Tufayl. He said, "with a protruding forehead," and did not say "bulging." He added,Umar bin Khattab رضي الله عنه stood up and said, "Messenger of Allah, shall I not strike his neck?"He replied, "No."Then the man turned away, and Khalid, the Sword of Allah, stood up and said, "Messenger of Allah, shall I not strike his neck?"He replied, "No," then said, "From this man's lineage will emerge a people who recite the Book of Allah smoothly and fluently."Ammar said, "I think he said, 'If I live to see them, I will surely kill them as Thamud were killed.'"

Muslim 2453

Sahih

حدثنا عثمان بن أبي شيبة حدثنا جرير

عن عمارة بن القعقاع

بهذا الإسناد قال وعلقمة بن علاثة ولم يذكر عامر بن الطفيل وقال ناتئ الجبهة ولم يقل ناشز وزاد فقام إليه عمر بن الخطاب رضي الله عنه فقال يا رسول الله ألا أضرب عنقه قال لا قال ثم أدبر فقام إليه خالد سيف الله فقال يا رسول الله ألا أضرب عنقه قال لا فقال إنه سيخرج من ضئضئ هذا قوم يتلون كتاب الله لينا رطبا وقال قال عمارة حسبته قال لئن أدركتهم لأقتلنهم قتل ثمود

مسلم 2453صحيح
Contents
Reference
Commentary
Ayat
Collection
Sahih Muslim
Book
Zakat
Chapter
Khawarij and their characteristics
Numbering
Darussalam 2453
Muslim 2453