Joshua 23:12-13

12For if you turn back and cling to the remnant of these nations remaining among you and make marriages with them, so that you associate with them and they with you,

13know for certain that the Lord your God will no longer drive out these nations before you, but they shall be a snare and a trap for you, a whip on your sides and thorns in your eyes, until you perish from off this good ground that the Lord your God has given you.