Psalm 19:12 in the King James Version
Who can understand his errors? cleanse thou me from secret faults.
Context
11 Moreover your servant is warned by them. In keeping them there is great reward.
12 Who can discern his errors? Forgive me from hidden errors.
13 Keep back your servant also from presumptuous sins. Let them not have dominion over me. Then I will be upright. I will be blameless and innocent of great transgression.