Mishkat al-Masabih 27 Fitan كتاب الفتن 108

وَعَنْ عَمْرِو بْنِ حُرَيْثٍ عَنْ أَبِي بَكْرٍ الصّديق قَالَ: حَدَّثَنَا رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ: ” الدَّجَّالُ يَخْرُجُ مِنْ أَرْضٍ بِالْمَشْرِقِ يُقَالُ لَهَا: خُرَاسَانُ يَتْبَعُهُ أَقْوَامٌ كَأَنَّ وُجُوهَهُمُ المجانّ المطرقة ” . رَوَاهُ التِّرْمِذِيّ

`Amr b. Huraith quoted Abu Bakr as-Siddiq as saying that God’s messenger told them the dajjal would come forth from a land in the East called Khurasan followed by peoples whose faces resemble shields covered with skin. Tirmidhi transmitted it.