Mishkat al-Masabih 16 Retaliation كتاب القصاص 77

وَعَنِ ابْنِ عُمَرَ رَضِيَ اللَّهُ عَنْهُمَا عَنِ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ: ” لِجَهَنَّمَ سَبْعَةُ أَبْوَابٍ: بَابٌ مِنْهَا لِمَنْ سَلَّ السَّيْفَ عَلَى أُمَّتِي أَوْ قَالَ: عَلَى أُمَّةِ مُحَمَّدٍ ” . رَوَاهُ التِّرْمِذِيُّ وَقَالَ: هَذَا حَدِيثٌ غَرِيبٌ

Ibn ‘Umar reported the Prophet as saying, ‘‘Jahannam has seven gates, one of which is for those who draw a sword against my people,” or he said, “against Muhammad’s people.” Tirmidhi transmitted it, saying this is a gharib tradition.