“Have mercy upon me, O God, according to Thy lovingkindness: according unto the multitude of Thy tender mercies blot out my transgressions.
Wash me throughly from mine iniquity, and cleanse me from my sin. For I acknowledge my transgressions: and my sin is ever before me.
Against Thee, Thee only, have I sinned, and done this evil in Thy sight: that Thou mightest be justified when Thou speakest, and be clear when Thou judgest.
Behold, I was shapen in iniquity; and in sin did my mother conceive me.”  Psalm 51:1-5  (KJB)