Bible Verses About Confession of Sin: should be Full and Unreserved

I acknowledged my sin unto thee, and mine iniquity have I not hid. I said, I will confess my transgressions unto the LORD; and thou forgavest the iniquity of my sin. Selah.

For I acknowledge my transgressions: and my sin is ever before me.

We have sinned with our fathers, we have committed iniquity, we have done wickedly.