Joshua 23:11 KJV

9For the LORD hath driven out from before you great nations and strong: but as for you, no man hath been able to stand before you unto this day.

10One man of you shall chase a thousand: for the LORD your God, he it is that fighteth for you, as he hath promised you.

11Take good heed therefore unto yourselves, that ye love the LORD your God.

12Else if ye do in any wise go back, and cleave unto the remnant of these nations, even these that remain among you, and shall make marriages with them, and go in unto them, and they to you:

13Know for a certainty that the LORD your God will no more drive out any of these nations from before you; but they shall be snares and traps unto you, and scourges in your sides, and thorns in your eyes, until ye perish from off this good land which the LORD your God hath given you.