Psalm 51:1-4 NIV

[1] Have mercy on me, O God, according to your unfailing love; according to your great compassion blot out my transgressions. [2] Wash away all my iniquity and cleanse me from my sin. [3] For I know my transgressions, and my sin is always before me. [4] Against you, you only, have I sinned and done what is evil in your sight; so you are right in your verdict and justified when you judge.