If we confess our sins, He is faithful and just to forgive us our sins and to cleanse us from all unrighteousness. 

I acknowledge my transgressions, and my sin is always before me. Against You, You only, have I sinned, and done this evil in Your sight.And he arose and came to his father. But when he was still a great way off, his father saw him and had compassion, and ran and fell on his neck and kissed him. § I have blotted out, like a thick cloud, your transgressions, and like a cloud, your sins. Return to Me, for I have redeemed you. § Your sins are forgiven you for His name’s sake. § God in Christ forgave you. § That He might be just and the justifier of the one who has faith in Jesus.Then I will sprinkle clean water on you, and you shall be clean. § They shall walk with Me in white, for they are worthy.This is He who came by water and blood—Jesus Christ; not only by water, but by water and blood.