The Prophet [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."
عَنِ النَّبِيِّ ﷺ قَالَ لاَ تُقْتَلُ نَفْسٌ ظُلْمًا إِلاَّ كَانَ عَلَى ابْنِ آدَمَ الأَوَّلِ كِفْلٌ مِنْ دَمِهَا وَذَلِكَ أَنَّهُ أَوَّلُ مَنْ سَنَّ الْقَتْلَ