لَن

فَذُوقُوا۟ فَلَن نَّزِيدَكُمْ إِلَّا عَذَابًا

"So taste [the penalty], and never will We increase you except in torment."

إِنَّهُۥ ظَنَّ أَن لَّن يَحُورَ

Indeed, he had thought he would never return [to Allāh].

قَالَ إِنَّكَ لَن تَسْتَطِيعَ مَعِىَ صَبْرًۭا

He said, "Indeed, with me you will never be able to have patience.