The Prophet ﷺ said, "None is killed unjustly, but the first son of Adam will have a part of its burden," and perhaps Sufyan said, "a part of its blood" because he was the first to establish the tradition of murdering.

قَالَ النَّبِيُّ ﷺ: «لَيْسَ مِنْ نَفْسٍ تُقْتَلُ ظُلْمًا إِلاَّ كَانَ عَلَى ابْنِ آدَمَ الأَوَّلِ كِفْلٌ مِنْهَا»، وَرُبَّمَا قَالَ سُفْيَانُ «مِنْ دَمِهَا» لأَنَّهُ أَوَّلُ مَنْ سَنَّ الْقَتْلَ أَوَّلاً.