Joshua 23:7-13

Do not intermingle with the nations that are left among you nor speak the names of their gods when you take an oath. And by all means don’t worship or pray to them. As you have done until now, cling tightly to YAHWEH, for he is your God. YAHWEH has driven out great and powerful nations before you! No one was able to withstand you, for YAHWEH your God fights for you as he promised he would! That is why just one of you causes a thousand of our enemies to run away. Above all else, keep watch over your hearts, so as to always love YAHWEH your God. “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.