30فَطَوَّعَت لَهُ نَفسُهُ قَتلَ أَخيهِ فَقَتَلَهُ فَأَصبَحَ مِنَ الخاسِرينَMuhammad AsadBut the other's passion1 drove him to slaying his brother; and he slew him: and thus he became one of the lost.Among the many meanings attributable to the noun nafs (primarily, "soul", or "mind", or "self"), there is also that of "desire" or "passionate determination" (Qamus; see also Zamakhshari's Asas); in this context, the best rendering seems to be "passion".