Quran 35:8

أَفَمَن زُيِّنَ لَهُ ۥ سُوٓءُ عَمَلِهِۦ فَرَءَاهُ حَسَنً۬اۖ فَإِنَّ ٱللَّهَ يُضِلُّ مَن يَشَآءُ وَيَہۡدِى مَن يَشَآءُۖ فَلَا تَذۡهَبۡ نَفۡسُكَ عَلَيۡہِمۡ حَسَرَٲتٍۚ إِنَّ ٱللَّهَ عَلِيمُۢ بِمَا يَصۡنَعُونَ ٨

Note the one whose evil work is adorned (in his eyes), until he thinks that it is righteous. ALLAH thus sends astray whoever wills (to go astray), and He guides whoever wills (to be guided). Therefore, do not grieve over them. ALLAH is fully aware of everything they do.