The certainty of divine decree

كُتِبَ عَلَيْهِ أَنَّهُۥ مَن تَوَلَّاهُ فَأَنَّهُۥ يُضِلُّهُۥ وَيَهْدِيهِ إِلَىٰ عَذَابِ ٱلسَّعِيرِ

It has been decreed for him [i.e., every devil] that whoever turns to him - he will misguide him and will lead him to the punishment of the Blaze.