Eternal punishment in the Hellfire

وَٱلَّذِينَ كَفَرُوا۟ وَكَذَّبُوا۟ بِـَٔايَـٰتِنَآ أُو۟لَـٰٓئِكَ أَصْحَـٰبُ ٱلْجَحِيمِ

But those who disbelieved and denied Our signs - they are the companions of Hellfire.

ذَٰلِكَ جَزَآءُ أَعْدَآءِ ٱللَّهِ ٱلنَّارُ ۖ لَهُمْ فِيهَا دَارُ ٱلْخُلْدِ ۖ جَزَآءًۢ بِمَا كَانُوا۟ بِـَٔايَـٰتِنَا يَجْحَدُونَ

That is the recompense of the enemies of Allāh - the Fire. For them therein is the home of eternity as recompense for what they, of Our verses, were rejecting.