5:30
فَطَوَّعَتْ لَهُۥ نَفْسُهُۥ قَتْلَ أَخِيهِ فَقَتَلَهُۥ فَأَصْبَحَ مِنَ ٱلْخَـٰسِرِينَ
faṭawwaʿat lahu nafsuhu qatla akhīhi faqatalahu fa-aṣbaḥa mina l-khāsirīna
But his soul prompted him to kill his brother: he killed him and became one of the losers.
So the Nafs (self) of the other (latter one) encouraged him and made fair-seeming to him the murder of his brother; he murdered him and became one of the losers.