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.
Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
nasai:3986 – Muḥammad b. Muʿāwiyah b. Mālaj > Muḥammad b. Salamah al-Ḥarrānī > Ibn Isḥāq > Ibrāhīm b. Muhājir > Ismāʿīl a freed slave of ʿAbdullāh b. ʿAmr > ʿAbdullāh b. ʿAmr b. al-ʿĀṣ

"The Messenger of Allah [SAW] said: 'By the One in Whose Hand is my soul, killing a believer is more grievous before Allah than the extinction of the whole world.'"  

النسائي:٣٩٨٦ – أَخْبَرَنَا مُحَمَّدُ بْنُ مُعَاوِيَةَ بْنِ مَالَجَ قَالَ حَدَّثَنَا مُحَمَّدُ بْنُ سَلَمَةَ الْحَرَّانِيُّ عَنِ ابْنِ إِسْحَاقَ عَنْ إِبْرَاهِيمَ بْنِ مُهَاجِرٍ عَنْ إِسْمَاعِيلَ مَوْلَى عَبْدِ اللَّهِ بْنِ عَمْرٍو عَنْ عَبْدِ اللَّهِ بْنِ عَمْرِو بْنِ الْعَاصِ قَالَ

قَالَ رَسُولُ اللَّهِ ﷺ وَالَّذِي نَفْسِي بِيَدِهِ لَقَتْلُ مُؤْمِنٍ أَعْظَمُ عِنْدَ اللَّهِ مِنْ زَوَالِ الدُّنْيَا قَالَ أَبُو عَبْدِ الرَّحْمَنِ إِبْرَاهِيمُ بْنُ الْمُهَاجِرِ لَيْسَ بِالْقَوِيِّ  

See similar narrations below:

Collected by Nasāʾī's Kubrá, Suyūṭī
nasai-kubra:3434 – Muḥammad b. Muʿāwiyah b. Mālaj > Muḥammad b. Salamah al-Ḥarrānī > Ibn Isḥāq > Ibrāhīm b. Muhājir > Ismāʿīl a freed slave of ʿAbdullāh b. ʿAmr > ʿAbdullāh b. ʿAmr b. al-ʿĀṣ

"Killing a believer is more grievous before Allah than the extinction of the whole world." (Using translation from Nasāʾī 3988)   

الكبرى للنسائي:٣٤٣٤ – أَخْبَرَنَا مُحَمَّدُ بْنُ مُعَاوِيَةَ بْنِ مَالَجَ قَالَ حَدَّثَنَا مُحَمَّدُ بْنُ سَلَمَةَ الْحَرَّانِيُّ عَنِ ابْنِ إِسْحَاقَ عَنْ إِبْرَاهِيمَ بْنِ مُهَاجِرٍ عَنْ إِسْمَاعِيلَ مَوْلَى عَبْدِ اللهِ بْنِ عَمْرٍو عَنْ عَبْدِ اللهِ بْنِ عَمْرِو بْنِ الْعَاصِ قَالَ

قَالَ رَسُولُ اللهِ ﷺ «وَالَّذِي نَفْسِي بِيَدِهِ لَقَتْلُ مُؤْمِنٍ أَعْظَمُ عِنْدَ اللهِ مِنْ زَوَالِ الدُّنْيَا»  

nasai-kubra:3438 – al-Ḥasan b. Isḥāq > Khālid b. Khidāsh > Ḥātim b. Ismāʿīl > Bashīr b. al-Muhājir > ʿAbdullāh b. Buraydah from his father

"Killing a believer is more grievous before Allah than the extinction of the whole world." (Using translation from Nasāʾī 3988)  

الكبرى للنسائي:٣٤٣٨ – أَخْبَرَنَا الْحَسَنُ بْنُ إِسْحَاقَ قَالَ حَدَّثَنَا خَالِدُ بْنُ خِدَاشٍ قَالَ حَدَّثَنَا حَاتِمُ بْنُ إِسْمَاعِيلَ عَنْ بَشِيرِ بْنِ الْمُهَاجِرِ عَنْ عَبْدِ اللهِ بْنِ بُرَيْدَةَ عَنْ أَبِيهِ قَالَ

قَالَ رَسُولُ اللهِ ﷺ «قَتْلُ الْمُؤْمِنِ أَعْظَمُ عِنْدَ اللهِ مِنْ زَوَالِ الدُّنْيَا»