﴿ لِيَكْفُرُوا۟ بِمَآ ءَاتَيْنَٰهُمْ وَلِيَتَمَتَّعُوا۟ ۖ فَسَوْفَ يَعْلَمُونَ ﴾

“and thus they show utter ingratitude for all that We have vouchsafed them, and go on [thoughtlessly] enjoying their worldly life.”

(That they may disbelieve in that which We have given them) such that they disbelieve in the bounties that We have given them, (and that they may take their ease) live comfortably in their state of disbelief. (But they will come to know) what will be done with them upon the descent of torment upon them.