Eternal
They will remain in that state forever, with no relief from punishment and no hope of reprieve.
2:162They ever dwell therein. The doom will not be lightened for them, neither will they be reprieved.
3:88They will abide therein. Their doom will not be lightened, neither will they be reprieved;
16:85And when those who did wrong behold the doom, it will not be made light for them, nor will they be reprieved.