Now repent of your sins and turn to God, so that your sins may be wiped away. Then times of refreshment will come from the presence of the Lord, and he will again send you Jesus, your appointed Messiah. Acts 3:19-20

Have mercy on me, O God, according to your loving-kindness: according to the multitude of your tender mercies blot out my transgressions. Wash away all my iniquity and cleanse me from my sin. For I know my transgressions, and my sin is always before me. Against You, You only, have I sinned and done what is evil in Your sight so that You may be proved right when You speak and blameless when You judge.  Psalm 51