وَيَومَ يَعَضُّ الظّالِمُ عَلىٰ يَدَيهِ يَقولُ يا لَيتَنِي اتَّخَذتُ مَعَ الرَّسولِ سَبيلًا

And the Day the wrongdoer will bite on his hands [in regret] he will say, "Oh, I wish I had taken with the Messenger a way.