Matthew 23:26
You blind Pharisee! You must first clean the inside of the cup and the dish, so that the outside may be clean too.
Matthew 12:33
"You must either make the tree sound and its fruit sound, or make the tree bad and its fruit bad; a tree is judged by its fruit.
Luke 6:45
A good man, out of the good he has accumulated in his heart, produces good, and a bad man, out of what he has accumulated that is bad, produces what is bad. For his mouth says only what his heart is full of.
2 Corinthians 7:1
So since we have promises like these, dear friends, let us cleanse ourselves of everything that can defile body or spirit, and by reverence for God make our consecration complete.
Hebrews 10:22
let us draw near to God in sincerity of heart and with perfect faith, with our hearts cleansed from the sense of sin, and our bodies washed with clean water.
James 4:8
Approach God, and he will approach you. Wash your hands, you sinners! Make your hearts pure, you doubters!