Surah Saba Verse 21 - English Translation by Dr Munir Munshey
Surah Sabaوَمَا كَانَ لَهُۥ عَلَيۡهِم مِّن سُلۡطَٰنٍ إِلَّا لِنَعۡلَمَ مَن يُؤۡمِنُ بِٱلۡأٓخِرَةِ مِمَّنۡ هُوَ مِنۡهَا فِي شَكّٖۗ وَرَبُّكَ عَلَىٰ كُلِّ شَيۡءٍ حَفِيظٞ
He did not have any control (or authority) over them. (We let ´Iblees´ tempt people) so We may distinguish the one who believes in the afterlife from the one who remained in doubt about its existence. Your Lord is Watchful over every single thing