عَنْ عَبْدِ اللَّهِ بْنِ عَمْرٍو أَنَّ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ: «لَزَوَالُ الدُّنْيَا أَهْوَنُ عَلَى اللَّهِ مِنْ قَتْلِ رَجُلٍ مُسْلِمٍ» . رَوَاهُ التِّرْمِذِيّ وَالنَّسَائِيّ ووقفَه بعضُهم وَهُوَ الْأَصَح وَرَوَاهُ ابْنُ مَاجَهْ عَنِ الْبَرَاءِ بْنِ عَازِبٍ

Abu ad-Darda’ reported God’s Messenger as saying, “A believer will continue to go on quickly and well* so long as he does not kill anyone unlawfully, but when he does so he will grow weary.” Abu Dawud transmitted it.*i.e. quick to obey God’s commands and observing well what is due to God and man.