Matthew 12:34-36
12:34 Offspring of vipers! How are you able to say anything good, since you are evil? For the mouth speaks from what fills the heart.
12:35 The good person brings good things out of his good treasury, and the evil person brings evil things out of his evil treasury.
12:36 I tell you that on the day of judgment, people will give an account for every worthless word they speak.