Mishkat al-Masabih 28 Events of the Day of Resurrection and the Beginning of Creation كتاب أحوال القيامة وبدء الخلق 146

وَعَنْهُ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «إِنَّ غِلَظَ جِلْدِ الْكَافِرِ اثْنَانِ وَأَرْبَعُونَ ذِرَاعًا وَإِنَّ ضِرْسَهُ مِثْلُ أُحُدٍ وَإِنَّ مَجْلِسَهُ مِنْ جَهَنَّمَ مَا بَيْنَ مَكَّةَ وَالْمَدِينَةِ» . رَوَاهُ التِّرْمِذِيّ

He reported God’s messenger as saying, “The thickness of an infidel’s skin will be forty-two cubits, his molar tooth will be like Uhud, and his seat in Jahannam will be like the distance between Mecca and Medina.” Tirmidhi transmitted it.