Bible Verses About Alliance and Society with the Enemies of God: Are defiling

Now when these things were done, the princes drew near to me, saying, “The people of Israel, and the priests and the Levites, have not separated themselves from the peoples of the lands, following their abominations, even those of the Canaanites, the Hittites, the Perizzites, the Jebusites, the Ammonites, the Moabites, the Egyptians, and the Amorites.

For they have taken of their daughters for themselves and for their sons, so that the holy seed have mixed themselves with the peoples of the lands. Yes, the hand of the princes and rulers has been chief in this trespass.”