Surah 67. Al-Mulk, Ayah 11

The will then have passed through the fire of Judgment and will now be in the fire of Punishment. The Reality will not only now be clear to them, but after the questionings of the angels they cannot even pretend to make any excuses. They will freely confess, but that is not repentance, for repentance implies amendment, and the time for repentance and amendment will have long been past.