Joshua 23:12-15

“But if you ever turn away and make alliances with the nations that remain in your midst, and establish friendly relations with them and intermarry, then you may be sure that YAHWEH your God will no longer drive them out before you. Instead they will become a snare and a trap for you! They will be like whips on your backsides and thorns in your eyes until you perish from the good land that YAHWEH your God has given you. “Now I am about to go the way of all humanity. You know with all your heart and soul that not one promise of YAHWEH your God has failed. Without a doubt, every promise he made to us he has kept; he has fulfilled them all. Just as he has kept every wonderful promise he ever made to you, so YAHWEH your God will carry out every threat and will obliterate you completely from this good land which he has given you.