Quran 40:84 — Forgiver (Ghafer)

فَلَمّا رَأَوا بَأسَنا قالوا ءامَنّا بِاللَّهِ وَحدَهُ وَكَفَرنا بِما كُنّا بِهِ مُشرِكينَ

Subsequently, when they saw our retribution they said, "Now we believe in GOD ALONE, and we now disbelieve in the idol worship that we used to practice."

[40:83] When their messengers went to them with clear proofs, they rejoiced in the knowledge they had inherited, and the very things they ridiculed were the cause of their fall.

[40:85] Their belief then could not help them in the least, once they saw our retribution. Such is GOD's system that has been established to deal with His creatures; the disbelievers are always doomed.