Matthew 12:39
"Wicked and faithless generation!" He replied, "they clamour for a sign, but none shall be given to them except the sign of the Prophet Jonah.
Matthew 16:4
A wicked and faithless generation are eager for a sign; but none shall be given to them except the sign of Jonah." and He left them and went away.
Luke 11:29-32
Now when the crowds came thronging upon Him, He proceeded to say, "The present generation is a wicked generation: it requires some sign, but no sign shall be given to it except that of Jonah.
Mark 8:38
Every one, however, who has been ashamed of me and of my teachings in this faithless and sinful age, of him the Son of Man also will be ashamed when He comes in His Father's glory with the holy angels."
James 4:4
You unfaithful women, do you not know that friendship with the world means enmity to God? Therefore whoever is bent on being friendly with the world makes himself an enemy to God.