Hadith on Violence: Two Muslims who fight each other are both in Hell

Abu Bakrah reported: The Prophet, peace and blessings be upon him, said, “If two Muslims confront each other with swords, both the killer and the killed will be in Hellfire.” It was said, “O Messenger of Allah, we understand for the killer, but why for the one killed?” The Prophet said, “Verily, he intended to kill his companion.

Source: Ṣaḥīḥ al-Bukhārī 6672, Ṣaḥīḥ Muslim 2888

Grade: Muttafaqun Alayhi (authenticity agreed upon) according to Al-Bukhari and Muslim

عَنْ أَبُو بَكْرَةَ عَنْ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ إِذَا تَوَاجَهَ الْمُسْلِمَانِ بِسَيْفَيْهِمَا فَالْقَاتِلُ وَالْمَقْتُولُ فِي النَّارِ قَالَ فَقُلْتُ أَوْ قِيلَ يَا رَسُولَ اللَّهِ هَذَا الْقَاتِلُ فَمَا بَالُ الْمَقْتُولِ قَالَ إِنَّهُ قَدْ أَرَادَ قَتْلَ صَاحِبِهِ

6672 صحيح البخاري كتاب الفتن باب إذا التقى المسلمان بسيفيهما

2888 صحيح مسلم كتاب الفتن وأشراط الساعة باب إذا تواجه المسلمان بسيفيهما