39 But he answered them, “An evil and adulterous generation seeks after a sign, but no sign will be given to it but the sign of Jonah the prophet.
Matthew 12:39 Cross References - WEB
Isaiah 57:3
3 “But draw near here, you sons of a sorceress, you offspring of adulterers and prostitutes.
Matthew 16:4
4 An evil and adulterous generation seeks after a sign, and there will be no sign given to it, except the sign of the prophet Jonah.” He left them, and departed.
Mark 8:38
38 For whoever will be ashamed of me and of my words in this adulterous and sinful generation, the Son of Man also will be ashamed of him, when he comes in his Father’s glory, with the holy angels.”
Luke 11:29-32
29 When the multitudes were gathering together to him, he began to say, “This is an evil generation. It seeks after a sign. No sign will be given to it but the sign of Jonah, the prophet.
30 For even as Jonah became a sign to the Ninevites, so the Son of Man will also be to this generation.
31 The Queen of the South will rise up in the judgment with the men of this generation, and will condemn them: for she came from the ends of the earth to hear the wisdom of Solomon; and behold, one greater than Solomon is here.
32 The men of Nineveh will stand up in the judgment with this generation, and will condemn it: for they repented at the preaching of Jonah, and behold, one greater than Jonah is here.
James 4:4
4 You adulterers and adulteresses, don’t you know that friendship with the world is hostility toward God? Whoever therefore wants to be a friend of the world makes himself an enemy of God.