Repentance
[9:125]
But as for those in whose hearts is disease, each new message but adds another [element of] disbelief to the disbelief which they already harbour, and they die while [still] refusing to acknowledge the truth.

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* v.125 : Lit., “it but adds [another] loathsome evil to their loathsome evil” – i.e., makes them more stubborn in their denying the truth of God’s messages because they are a priori determined to deny everything that is incompatible with their refusal to admit the existence of anything that is beyond the reach of human perception (al-ghayb – see sūrah 2, note 3).