﴿ وَيَوْمَ يَعَضُّ ٱلظَّالِمُ عَلَىٰ يَدَيْهِ يَقُولُ يَٰلَيْتَنِى ٱتَّخَذْتُ مَعَ ٱلرَّسُولِ سَبِيلًۭا ﴾

“and a Day on which the evildoer will bite his hands [in despair], exclaiming: “Oh, would that I had followed the path shown to me by the apostle!”

Please check ayah 25:29 for complete tafsir.