'Break My Covenant' in the Bible

The Lord said to Moses, “Behold, you are about to lie down [in death] with your fathers; and this people will arise and play the prostitute (commit apostasy) with the foreign gods [of the people] of the land, where they go to be among them. They will abandon (turn away from) Me and break My covenant which I have made with them.

For when I bring them into the land which I have sworn to their fathers, a land [of plenty] flowing with milk and honey, and they have eaten and are satisfied and become prosperous, then they will turn to other gods and serve them, and despise and reject Me and break My covenant.