The Prohibition of Bloodshed
أَخْبَرَنَا عَمْرُو بْنُ عَلِيٍّ، عَنْ عَبْدِ الرَّحْمَنِ، قَالَ حَدَّثَنَا سُفْيَانُ، عَنِ الأَعْمَشِ، عَنْ عَبْدِ اللَّهِ بْنِ مُرَّةَ، عَنْ مَسْرُوقٍ، عَنْ عَبْدِ اللَّهِ، عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ " لاَ تُقْتَلُ نَفْسٌ ظُلْمًا إِلاَّ كَانَ عَلَى ابْنِ آدَمَ الأَوَّلِ كِفْلٌ مِنْ دَمِهَا وَذَلِكَ أَنَّهُ أَوَّلُ مَنْ سَنَّ الْقَتْلَ " .
It was narrated from 'Abdullah that: The Prophet (ﷺ) [SAW] said: "No person is killed wrongfully, but a share of responsibility for his blood will be upon the first son of Adam, because he was the first one to set the precedence, of killing."