Sura 5 Al-Ma'idah (The Table Spread), ayah 30

1. فَطَوَّعَتْ لَهُ نَفْسُهُ قَتْلَ أَخِيهِ فَقَتَلَهُ فَأَصْبَحَ مِنَ الْخَاسِرِينَ

   And his soul permitted to him the murder of his brother, so he killed him and became among the losers.

   5:30

Translation: Saheeh International