Matthew 12:34-37 NIV

34 You brood of vipers, how can you who are evil say anything good? For the mouth speaks what the heart is full of.

References for Matthew 12:34

35 A good man brings good things out of the good stored up in him, and an evil man brings evil things out of the evil stored up in him.
36 But I tell you that everyone will have to give account on the day of judgment for every empty word they have spoken.
37 For by your words you will be acquitted, and by your words you will be condemned.”

References for Matthew 12:37