adulterous.

Isaiah 57:3
But come here, you sons of a sorceress, you offspring of adulterers and prostitutes!

Mark 8:38
For whoever is ashamed of Me and My words in this adulterous and sinful generation, the Son of Man will also be ashamed of him when He comes in His Father's glory with the holy angels."

James 4:4
You adulteresses! Do you not know that friendship with the world is hostility toward God? Therefore, whoever chooses to be a friend of the world renders himself an enemy of God.

no sign.

Matthew 16:4
A wicked and adulterous generation demands a sign, but none will be given it except the sign of Jonah." Then He left them and went away.

Luke 11:29, 30
As the crowds were increasing, Jesus said, "This is a wicked generation. It demands a sign, but none will be given it except the sign of Jonah. . . .