'Immorality' in the Bible

Because of the thoughtlessness of Israel’s prostitution [her immorality mattered little to her], she desecrated the land and committed adultery with [idols of] stones and trees.

I've seen your detestable behavior: your adulteries, your passionate neighing, your lewd immorality on the hills in the field. How terrible it will be for you, Jerusalem! You are unclean. How much longer will this go on?"