Matthew 12:34-36

You brood of vipers, how can you speak good things when you are evil? For the mouth speaks out of that which fills the heart. The good man, from his [inner]good treasure, brings out good things; and the evil man, from his [inner]evil treasure, brings out evil things. But I tell you, on the day of judgment people will have to give an accounting for every careless or useless word they speak.