Matthew 23:26
Blind Pharisee! cleanse first that which is in the cup and platter, that its outside may be clean also.
Matthew 12:33
Either make the tree good and its fruit good, or make the tree bad, and its fruit bad; for a tree is known by its fruit.
Luke 6:45
The good man out of the good treasury of his heart brings forth good, and the evil man out of the evil brings forth evil; for out of the abundance of the heart its mouth speaks.
2 Corinthians 7:1
Having therefore these promises, beloved, let us purify ourselves from every defilement of the flesh and spirit, perfecting holiness in the fear of God.
Hebrews 10:22
let us approach with a true heart in a full assurance of faith, sprinkled in heart from an evil conscience, and washed in body with pure water,
James 4:8
draw nigh to God and he will draw nigh to you. Cleanse your hands, sinners, purify your hearts, double-minded.