Surah Saba Verse 21 - English Translation by Edward Henry Palmer
Surah Sabaوَمَا كَانَ لَهُۥ عَلَيۡهِم مِّن سُلۡطَٰنٍ إِلَّا لِنَعۡلَمَ مَن يُؤۡمِنُ بِٱلۡأٓخِرَةِ مِمَّنۡ هُوَ مِنۡهَا فِي شَكّٖۗ وَرَبُّكَ عَلَىٰ كُلِّ شَيۡءٍ حَفِيظٞ
Yet had he no authority over them, save that we might know who it was that believed in the hereafter from him who amongst them was in doubt; for thy Lord guards everything