In their hearts is disease, so Allah has increased their disease; and for them is a painful punishment because they [habitually] used to lie.
The Saheeh International Quran Translation
فِى قُلُوبِهِم مَّرَضٌ فَزَادَهُمُ ٱللَّهُ مَرَضًا وَلَهُمْ عَذَابٌ أَلِيمٌۢ بِمَا كَانُوا۟ يَكْذِبُونَIn their hearts is disease, so Allah has increased their disease; and for them is a painful punishment because they [habitually] used to lie.