Testing and trials (fitnah)

لِّيَجْعَلَ مَا يُلْقِى ٱلشَّيْطَـٰنُ فِتْنَةً لِّلَّذِينَ فِى قُلُوبِهِم مَّرَضٌ وَٱلْقَاسِيَةِ قُلُوبُهُمْ ۗ وَإِنَّ ٱلظَّـٰلِمِينَ لَفِى شِقَاقٍۭ بَعِيدٍ

[That is] so He may make what Satan throws in [i.e., asserts] a trial for those within whose hearts is disease and those hard of heart. And indeed, the wrongdoers are in extreme dissension.

أَحَسِبَ ٱلنَّاسُ أَن يُتْرَكُوٓا۟ أَن يَقُولُوٓا۟ ءَامَنَّا وَهُمْ لَا يُفْتَنُونَ

Do the people think that they will be left to say, "We believe" and they will not be tried?

۞ وَلَقَدْ فَتَنَّا قَبْلَهُمْ قَوْمَ فِرْعَوْنَ وَجَآءَهُمْ رَسُولٌ كَرِيمٌ

And We had already tried before them the people of Pharaoh, and there came to them a noble messenger [i.e., Moses],