He was spared because he was righteous in God’s eyes and was greatly distressed by the loose conduct of the law - defying people of Sodom and Gomorrah.
فقد بقي على قيد الحياة لأنه وُجد بارّا في عيني الله وكان متضايقا جدا من فجور اهل سدوم وعمورة البغاة .‏