Surah At-Tawbah 9:125

وَأَمَّا ٱلَّذِينَ فِى قُلُوبِهِم مَّرَضٌ فَزَادَتْهُمْ رِجْسًا إِلَىٰ رِجْسِهِمْ وَمَاتُوا۟ وَهُمْ كَـٰفِرُونَ

But as for those in whose hearts is disease, it has [only] increased them in evil [in addition] to their evil. And they will have died while they are disbelievers.

Translation: Saheeh International

Tafsir

But as for those in whose hearts is sickness a weakness of faith it only adds abomination to their abomination that is it only adds disbelief to their disbelief since they disbelieve in it and they die while they were disbelievers.

Excerpt from Tafsir al-Jalalayn, commentary on 9:125, via Quran.com. The reader has the full commentary and 9 more tafsirs.