You shall not make any cuts on your body for the dead or tattoo yourselves: I am the Lord.
(Leviticus 19:28) ESV 

Purge me with hyssop, and I shall be clean; wash me, and I shall be whiter than snow.
(Psalm 51:7) ESV 

Create in me a clean heart, O God, and renew a right spirit within me.
(Psalm 51:10) ESV 

Who can say, “I have made my heart pure; I am clean from my sin”?
(Proverbs 20:9) ESV 

Wash yourselves; make yourselves clean; remove the evil of your deeds from before my eyes; cease to do evil,
(Isaiah 1:16) ESV 

I will sprinkle clean water on you, and you shall be clean from all your uncleannesses, and from all your idols I will cleanse you.
(Ezekiel 36:25) ESV 

Blessed are the pure in heart, for they shall see God.
(Matthew 5:8) ESV 

You blind Pharisee! First clean the inside of the cup and the plate, that the outside also may be clean.
(Matthew 23:26) ESV 

Finally, brothers, whatever is true, whatever is honorable, whatever is just, whatever is pure, whatever is lovely, whatever is commendable, if there is any excellence, if there is anything worthy of praise, think about these things.
(Philippians 4:8) ESV 

He saved us, not because of works done by us in righteousness, but according to his own mercy, by the washing of regeneration and renewal of the Holy Spirit,
(Titus 3;5) ESV 

But if we walk in the light, as he is in the light, we have fellowship with one another, and the blood of Jesus his Son cleanses us from all sin.
(1 John 1:7) ESV 

If we confess our sins, he is faithful and just to forgive us our sins and to cleanse us from all unrighteousness.
(1 John 1:9) ESV