Surah 20. Ta-Ha, Ayah 111

I.e., evildoing which has not been atoned for by repentance before death (Razi). In this particular context, it may be an allusion to the rejection of God's guidance - His "reminder" - spoken of in verses {99-101}.

The metaphor of the burden of sin which the unjust carry on their backs is referred to in xx. 100-101 (see n. 2626), in vi. 31, and in other passages. Note that all faces, those of the just as well as of the unjust, will be humble before Allah: the best of us can claim no merit equal to Allah's Grace. But the just will have Hope: while the unjust, now that the curtain of Reality has risen, will be in absolute Despair!