Matthew 12:33-43

33 Either make the tree good and its fruit good: or make the tree evil, and its fruit evil. For by the fruit the tree is known.
34 O generation of vipers, how can you speak good things, whereas you are evil? for out of the abundance of the heart the mouth speaketh.
35 A good man out of a good treasure bringeth forth good things: and an evil man out of an evil treasure bringeth forth evil things.
36 But I say unto you, that every idle word that men shall speak, they shall render an account for it in the day of judgment.
37 For by thy words thou shalt be justified, and by thy words thou shalt be condemned.
38 Then some of the scribes and Pharisees answered him, saying: Master, we would see a sign from thee.
39 Who answering said to them: An evil and adulterous generation seeketh a sign: and a sign shall not be given it, but the sign of Jonas the prophet.
40 For as Jonas was in the whale’s belly three days and three nights: so shall the Son of man be in the heart of the earth three days and three nights.
41 The men of Ninive shall rise in judgment with this generation, and shall condemn it: because they did penance at the preaching of Jonas. And behold a greater than Jonas here.
42 The queen of the south shall rise in judgment with this generation, and shall condemn it: because she came from the ends of the earth to hear the wisdom of Solomon, and behold a greater than Solomon here.
43 And when an unclean spirit is gone out of a man he walketh through dry places seeking rest, and findeth none.