Joshua 23:11-13

11Therefore watch yourselves carefully, that you love the LORD your God. 12For if you turn away and cling to the rest of these nations that remain among you, and if you intermarry and associate with them, 13know for sure that the LORD your God will no longer drive out these nations before you. Instead, they will become for you a snare and a trap, a scourge in your sides and thorns in your eyes, until you perish from this good land that the LORD your God has given you.