Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
suyuti:1385a

“When one Muslim wields his weapon against his brother, both of them are at the edge of Hell, and if one of them kills the other, they will both enter it.” (Using translation from Ibn Mājah 3965)   

السيوطي:١٣٨٥a

"إذا المسلمان حَملَ أحدُهما على أخيهِ السلاحَ فَهُما في جرَفُ جهنمَ فإذا قَتَلَ أحدُهما صاحبه دخلاها جميعًا" .  

[حم] أحمد [م] مسلم عن أبي بكرة

See similar narrations below:

Collected by Muslim, Nasāʾī, Ibn Mājah, Aḥmad, Suyūṭī
muslim:2888d[Chain 1] Abū Bakr b. Abū Shaybah > Ghundar > Shuʿbah [Chain 2] Muḥammad b. al-Muthanná And Ibn Bashhār > Muḥammad b. Jaʿfar > Shuʿbah > Manṣūr > Ribʿī b. Ḥirāsh > Abū Bakrah

When two Muslims (confront each other) and the one amongst them attacks his brother with a weapon, both of them are at the brink of Hell-Fire. And when one of them kills his companion, both of them get into Hell-Fire.  

مسلم:٢٨٨٨dوَحَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ حَدَّثَنَا غُنْدَرٌ عَنْ شُعْبَةَ ح وَحَدَّثَنَا مُحَمَّدُ بْنُ الْمُثَنَّى وَابْنُ بَشَّارٍ قَالاَ حَدَّثَنَا مُحَمَّدُ بْنُ جَعْفَرٍ حَدَّثَنَا شُعْبَةُ عَنْ مَنْصُورٍ عَنْ رِبْعِيِّ بْنِ حِرَاشٍ عَنْ أَبِي بَكْرَةَ

عَنِ النَّبِيِّ ﷺ قَالَ إِذَا الْمُسْلِمَانِ حَمَلَ أَحَدُهُمَا عَلَى أَخِيهِ السِّلاَحَ فَهُمَا فِي جُرُفِ جَهَنَّمَ فَإِذَا قَتَلَ أَحَدُهُمَا صَاحِبَهُ دَخَلاَهَا جَمِيعًا  

nasai:4117Aḥmad b. Sulaymān > Yaʿlá > Sufyān > Manṣūr > Ribʿī > Abū Bakrah

"If two Muslim men bear weapons against each other, then they are both on the brink of Hell. And if one of them kills the other, they will both be in Hell."  

النسائي:٤١١٧أَخْبَرَنَا أَحْمَدُ بْنُ سُلَيْمَانَ قَالَ حَدَّثَنَا يَعْلَى قَالَ حَدَّثَنَا سُفْيَانُ عَنْ مَنْصُورٍ عَنْ رِبْعِيٍّ عَنْ أَبِي بَكْرَةَ قَالَ

إِذَا حَمَلَ الرَّجُلاَنِ الْمُسْلِمَانِ السِّلاَحَ أَحَدُهُمَا عَلَى الآخَرِ فَهُمَا عَلَى جُرُفِ جَهَنَّمَ فَإِذَا قَتَلَ أَحَدُهُمَا الآخَرَ فَهُمَا فِي النَّارِ  

ibnmajah:3965Muḥammad b. Bashhār > Muḥammad b. Jaʿfar > Shuʿbah > Manṣūr > Ribʿī b. Ḥirāsh > Abū Bakrah

“When one Muslim wields his weapon against his brother, both of them are at the edge of Hell, and if one of them kills the other, they will both enter it.”  

ابن ماجة:٣٩٦٥حَدَّثَنَا مُحَمَّدُ بْنُ بَشَّارٍ حَدَّثَنَا مُحَمَّدُ بْنُ جَعْفَرٍ حَدَّثَنَا شُعْبَةُ عَنْ مَنْصُورٍ عَنْ رِبْعِيِّ بْنِ حِرَاشٍ عَنْ أَبِي بَكْرَةَ

عَنِ النَّبِيِّ ﷺ قَالَ إِذَا الْمُسْلِمَانِ حَمَلَ أَحَدُهُمَا عَلَى أَخِيهِ السِّلاَحَ فَهُمَا عَلَى جُرُفِ جَهَنَّمَ فَإِذَا قَتَلَ أَحَدُهُمَا صَاحِبَهُ دَخَلاَهَا جَمِيعًا  

ahmad:20424Muḥammad b. Jaʿfar > Shuʿbah > Manṣūr > Ribʿī b. Ḥirāsh > Abū Bakarah

“When one Muslim wields his weapon against his brother, both of them are at the edge of Hell, and if one of them kills the other, they will both enter it.” (Using translation from Ibn Mājah 3965)  

أحمد:٢٠٤٢٤حَدَّثَنَا مُحَمَّدُ بْنُ جَعْفَرٍ حَدَّثَنَا شُعْبَةُ عَنْ مَنْصُورٍ عَنْ رِبْعِيِّ بْنِ حِرَاشٍ عَنْ أَبِي بَكَرَةَ

عَنِ النَّبِيِّ ﷺ أَنَّهُ قَالَ إِذَا الْمُسْلِمَانِ حَمَلَأَحَدُهُمَا عَلَى صَاحِبِهِ السِّلَاحَ فَهُمَا عَلَى جُرُفِ جَهَنَّمَ فَإِذَا قَتَلَ أَحَدُهُمَا صَاحِبَهُ دَخَلَاهَا جَمِيعًا  

suyuti:1375a

“When one Muslim wields his weapon against his brother, both of them are at the edge of Hell, and if one of them kills the other, they will both enter it.” (Using translation from Ibn Mājah 3965)   

السيوطي:١٣٧٥a

"إذا الْتقى المسلمانِ حَمَلَ أحدهما على أخيه السلاح فهما على حرفِ جهنّمَ فإذا قَتَلَ أحدُهما صاحبَه دَخَلاها جميعًا" .  

[ش] ابن أبى شيبة [حم] أحمد [م] مسلم [هـ] ابن ماجة عن أبي بكرة