consequences of denying revelation

وَٱلَّذِينَ كَفَرُوا۟ وَكَذَّبُوا۟ بِـَٔايَـٰتِنَآ أُو۟لَـٰٓئِكَ أَصْحَـٰبُ ٱلنَّارِ ۖ هُمْ فِيهَا خَـٰلِدُونَ

And those who disbelieve and deny Our signs - those will be companions of the Fire; they will abide therein eternally."

قَالُوا۟ بَلَىٰ قَدْ جَآءَنَا نَذِيرٌ فَكَذَّبْنَا وَقُلْنَا مَا نَزَّلَ ٱللَّهُ مِن شَىْءٍ إِنْ أَنتُمْ إِلَّا فِى ضَلَـٰلٍ كَبِيرٍ

They will say, "Yes, a warner had come to us, but we denied and said, 'Allāh has not sent down anything. You are not but in great error.'"