15:2
رُّبَمَا يَوَدُّ ٱلَّذِينَ كَفَرُوا۟ لَوْ كَانُوا۟ مُسْلِمِينَ
rubamā yawaddu alladhīna kafarū law kānū mus'limīna
The disbelievers may well come to wish they had submitted to God,
How much would those who disbelieved wish that they had been Muslims [those who have submitted themselves to Allâh’s Will in Islâm i.e. Islâmic Monotheism - this will be on the Day of Resurrection when they will see the disbelievers going to Hell and the Muslims going to Paradise].