A Bible passage to share with you...

"Have mercy on me, O God, according to your unfailing love; according to your great compassion blot out my transgressions. Wash away all my iniquity and cleanse me from my sin."
‭‭Psalm‬ ‭51:1-2‬ ‭NIV‬‬
http://bible.com/111/psa.51.1-2.niv