And as for the boy, his parents were believers, and we feared that he would overburden them by transgression and disbelief.
The Saheeh International Quran Translation
وَأَمَّا ٱلْغُلَٰمُ فَكَانَ أَبَوَاهُ مُؤْمِنَيْنِ فَخَشِينَآ أَن يُرْهِقَهُمَا طُغْيَٰنًا وَكُفْرًاAnd as for the boy, his parents were believers, and we feared that he would overburden them by transgression and disbelief.