﴿ وَمَا كَانَ لَهُۥ عَلَيْهِم مِّن سُلْطَٰنٍ إِلَّا لِنَعْلَمَ مَن يُؤْمِنُ بِٱلْءَاخِرَةِ مِمَّنْ هُوَ مِنْهَا فِى شَكٍّۢ ۗ وَرَبُّكَ عَلَىٰ كُلِّ شَىْءٍ حَفِيظٌۭ ﴾

“And yet, he had no power at all over them: [for if We allow him to tempt man,] it is only to the end that We might make a clear distinction between those who [truly] believe in the life to come and those who are in doubt thereof: for thy Sustainer watches over all things.”

And he did not have any warrant over them any power to sway them from Us but that We might know by this knowledge being made manifest him who believed in the Hereafter from him who was in doubt thereof and so requite each of the two accordingly. And your Lord is Preserver Watcher of all things.