'Adulterous' in the Bible

But He answered them, “An evil and adulterous generation demands a sign, but no sign will be given to it except the sign of the prophet Jonah.

An evil and adulterous generation demands a sign, but no sign will be given to it except the sign of Jonah.” Then He left them and went away.

For whoever is ashamed of Me and of My words in this adulterous and sinful generation, the Son of Man will also be ashamed of him when He comes in the glory of His Father with the holy angels.”