'Prostitute Themselves' in the Bible

Be careful not to make a covenant with the inhabitants of the land, for when they prostitute themselves to their gods and sacrifice to their gods, and someone invites you, you will eat from his sacrifice;

and you then take his daughters for your sons, and when his daughters prostitute themselves to their gods, they will make your sons prostitute themselves to their gods as well.

Then the Lord said to Moses, "You are about to die, and then these people will begin to prostitute themselves with the foreign gods of the land into which they are going. They will reject me and break my covenant that I have made with them.