How many are my iniquities and sins? Reveal to me my transgression and sin.
Here, I. Job enquires after his sins, and begs to have them discovered to him. He looks up to God, and asks him what was the number of them (How many are my iniquities?) and what were the particulars of them: Make me to know my transgressions, Job 13:23. His friends were ready enough to tell him how numerous and how heinous they were, Job 22:5.
Commenting on Job 13:23-28
How many are mine iniquities and sins? Whether of ignorance or presumption, through mistake or wilfulness, voluntary or involuntary, sins of omission or commission, secret or open, or of heart, lip, or life; for by this heap of words he uses in this and the next clause he means all sorts of sins, be they what they would; he desires to know what they were...
The catalogue of my sins ought to be great, to judge from the severity with which God ever anew crushes one already bowed down. Would that He would reckon them up! He then would see how much my calamities outnumber them. sin?--singular, "I am unconscious of a single particular sin, much less many" [UMBREIT].