Matthew 12
34 Ref You offspring of vipers, how can you, being evil, speak good things? For out of the abundance of the heart, the mouth speaks.
35 Ref The good man out of his good treasure brings out good things, and the evil man out of his evil treasure{TR adds "of the heart"} brings out evil things.
36 Ref I tell you that every idle word that men speak, they will give account of it in the day of judgment.
37 Ref For by your words you will be justified, and by your words you will be condemned."