Those who denied the day of recompense.
Translation endnotes
[83:9-20] The book that confounds the wicked like a prison (siggin), and serves the do-gooders as an elevator (illiyin), is described as kitabun marqum, that is, numbered book or numerical book. The wicked rejects it, while the good people witness its marvels. [83:11] The yawm ul-din is described as the day of Judgment. Those who believe that they will be saved by their idol's intercession are in denial of that day. See 74:46- 48 and 1:4