'Adulterous' in the Bible

But he, answering, said to them, A wicked and adulterous generation seeks after a sign, and a sign shall not be given to it save the sign of Jonas the prophet.

A wicked and adulterous generation seeks after a sign, and a sign shall not be given to it save the sign of Jonas. And he left them and went away.

For whosoever shall be ashamed of me and of my words in this adulterous and sinful generation, of him shall the Son of man also be ashamed when he shall come in the glory of his Father with the holy angels.