Matthew 23:26
thou blind pharisee, cleanse first the inside of the cup and of the dish, that the outside of them may be also clean.
Matthew 12:33
Either allow the tree to be good, and it's fruit good; or shew the tree to be corrupt, and it's fruit corrupt: for the tree is known by it's fruit.
Luke 6:45
A good man, out of the good treasure of his heart, bringeth forth that which is good; and an evil man, out of the evil treasure of his heart, bringeth forth that which is evil: for out of the abundance of the heart his mouth speaketh.
2 Corinthians 7:1
Having therefore, my beloved, these promises, let us purify ourselves from all defilement of flesh and spirit, perfecting holiness in the fear of God.
Hebrews 10:22
let us draw near with sincerity, in the full assurance of faith, having our hearts cleansed from an evil conscience, and our bodies washed with pure water.
James 4:8
Draw near to God, and He will draw near to you: cleanse your hands, O sinners, and purify your hearts, ye double minded.