Surah Saba Verse 21 - English Translation by Mir Aneesuddin
Surah Sabaوَمَا كَانَ لَهُۥ عَلَيۡهِم مِّن سُلۡطَٰنٍ إِلَّا لِنَعۡلَمَ مَن يُؤۡمِنُ بِٱلۡأٓخِرَةِ مِمَّنۡ هُوَ مِنۡهَا فِي شَكّٖۗ وَرَبُّكَ عَلَىٰ كُلِّ شَيۡءٍ حَفِيظٞ
And he (the devil) has no authority on them, except that (through his instigations to human beings) We (come to ) know (or distinguish) him who believes in the hereafter from him who is in doubt about it, and your Lord is a Custodian over everything