Hadithcore
Sunan Abi Dawud, 4766
sahih· Al-Albani

The tradition mentioned above has also been transmitted by Anas through a different chain of narrators in a similar manner. This version adds; Their sign is shaving the head and eliminating the hair. If you see them, kill them. Abu Dawud said:

Tasmid means uprooting the hair.

حَدَّثَنَا الْحَسَنُ بْنُ عَلِيٍّ، حَدَّثَنَا عَبْدُ الرَّزَّاقِ، أَخْبَرَنَا مَعْمَرٌ، عَنْ قَتَادَةَ، عَنْ أَنَسٍ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم نَحْوَهُ قَالَ ‏:‏ ‏

‏ سِيمَاهُمُ التَّحْلِيقُ وَالتَّسْبِيدُ، فَإِذَا رَأَيْتُمُوهُمْ فَأَنِيمُوهُمْ ‏

‏ ‏.‏ قَالَ أَبُو دَاوُدَ ‏:‏ التَّسْبِيدُ اسْتِئْصَالُ الشَّعْرِ ‏.‏

References2 variants
In-Book Reference
Book 42, Hadith 171
English Reference
Book 41, Hadith 4748