The consequences of turning away from truth

وَأَقْسَمُوا۟ بِٱللَّهِ جَهْدَ أَيْمَـٰنِهِمْ لَئِن جَآءَهُمْ نَذِيرٌ لَّيَكُونُنَّ أَهْدَىٰ مِنْ إِحْدَى ٱلْأُمَمِ ۖ فَلَمَّا جَآءَهُمْ نَذِيرٌ مَّا زَادَهُمْ إِلَّا نُفُورًا

And they swore by Allāh their strongest oaths that if a warner came to them, they would be more guided than [any] one of the [previous] nations. But when a warner came to them, it did not increase them except in aversion

وَمَن يُضْلِلِ ٱللَّهُ فَمَا لَهُۥ مِن وَلِىٍّ مِّنۢ بَعْدِهِۦ ۗ وَتَرَى ٱلظَّـٰلِمِينَ لَمَّا رَأَوُا۟ ٱلْعَذَابَ يَقُولُونَ هَلْ إِلَىٰ مَرَدٍّ مِّن سَبِيلٍ

And he whom Allāh sends astray - for him there is no protector beyond Him. And you will see the wrongdoers, when they see the punishment, saying, "Is there for return [to the former world] any way?"