'Unfaithfulness' in the Bible

and your children will wander in the wilderness forty years and suffer for your unfaithfulness, until your dead bodies lie finished in the wilderness.

You must have this tassel so that you may look at it and remember all the commandments of the Lord and obey them and so that you do not follow after your own heart and your own eyes that lead you to unfaithfulness.

The people of Judah were carried away to Babylon because of their unfaithfulness.

I will throw my net over him and he will be caught in my snare; I will bring him to Babylon and judge him there because of the unfaithfulness he committed against me.

They will not defile themselves with their idols, their detestable things, and all their rebellious deeds. I will save them from all their unfaithfulness by which they sinned. I will purify them; they will become my people and I will become their God.