وَأَمَّا ٱلَّذِينَ فِى قُلُوبِهِم مَّرَضٌ فَزَادَتْهُمْ رِجْسًا إِلَىٰ رِجْسِهِمْ وَمَاتُوا۟ وَهُمْ كَـٰفِرُونَ
“But as for those with sickness in their hearts, it has increased them only in wickedness upon their wickedness, and they die as disbelievers.”
Part of the well-established hypocrites-who-stayed-behind-from-Tabuk passage of Surat al-Tawbah.