Surah Saba Verse 21 - English Translation by Abul Ala Maududi
Surah Sabaوَمَا كَانَ لَهُۥ عَلَيۡهِم مِّن سُلۡطَٰنٍ إِلَّا لِنَعۡلَمَ مَن يُؤۡمِنُ بِٱلۡأٓخِرَةِ مِمَّنۡ هُوَ مِنۡهَا فِي شَكّٖۗ وَرَبُّكَ عَلَىٰ كُلِّ شَيۡءٍ حَفِيظٞ
Iblis had no authority over them and whatever happened was in order that We might know him who believes in the Hereafter as distinct from him who is in doubt about it. Your Lord is watchful over everything