عَنْ عَبْدِ اللَّهِ بْنِ عَمْرٍو
أَنَّ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ: «لَزَوَالُ الدُّنْيَا أَهْوَنُ عَلَى اللَّهِ مِنْ قَتْلِ رَجُلٍ مُسْلِمٍ»
Abdallah ibn Amr reported the Prophet (sallallahu alayhi wa sallam) as saying, “The passing away of the world would mean less to God than the murder of a Muslim man.” Tirmidhi and Nasai transmitted it. Some traced it only to the Companion, and that is the soundest view. Ibn Majah transmitted it on the authority of Al-Bara ibn Azib.
Mishkat al-Masabih 3326, Book 17, Retaliation, Hadith 15. 1 min read