فَطَوَّعَتْ لَهُ نَفْسُهُ قَتْلَ أَخِيهِ فَقَتَلَهُ فَأَصْبَحَ مِنَ الْخَاسِرِينَ
[5:30]
Then his mind facilitated to him the slaying of his brother so he slew him; then he became one of the losers
The (selfish) soul of the other led him to the murder of his brother: he murdered him, and became (himself) one of the lost ones.
But (the other's) mind imposed on him the killing of his brother, so he slew him and became one of the losers.