Psalm 19:12 in the World English Bible
Who can discern his errors? Forgive me from hidden errors.
Context
11 Moreover by them is thy servant warned: and in keeping of them there is great reward.
12 Who can understand his errors? cleanse thou me from secret faults.
13 Keep back thy servant also from presumptuous sins; let them not have dominion over me: then shall I be upright, and I shall be innocent from the great transgression.