'Adulterous' in the Bible

For a harlot is a deep pitAnd an adulterous woman is a narrow well.

Take his garment when he becomes surety for a stranger;And for an adulterous woman hold him in pledge.

This is the way of an adulterous woman:She eats and wipes her mouth,And says, “I have done no wrong.”

Then those of you who escape will remember Me among the nations to which they will be carried captive, how I have been hurt by their adulterous hearts which turned away from Me, and by their eyes which played the harlot after their idols; and they will loathe themselves in their own sight for the evils which they have committed, for all their abominations.

But He answered and said to them, “An evil and adulterous generation craves for a sign; and yet no sign will be given to it but the sign of Jonah the prophet;

An evil and adulterous generation seeks after a sign; and a sign will not be given it, except the sign of Jonah.” And He left them and went away.

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 the glory of His Father with the holy angels.”