Matthew 12:39

39ὁAndδὲansweringἀποκριθεὶςHe saidεἶπενto themαὐτοῖς·A generationΓενεὰevilπονηρὰandκαὶadulterousμοιχαλὶςa signσημεῖονseeks forἐπιζητεῖ,andκαὶa signσημεῖονnotοὐwill be givenδοθήσεταιto itαὐτῇifεἰnotμὴtheτὸsignσημεῖονof JonahἸωνᾶtheτοῦprophetπροφήτου.

And answering, He said to them, “An evil and adulterous generation seeks after a sign, and no sign will be given to it except the sign of Jonah the prophet.