Exodus 34:12-16

12 aTake care, lest you make a covenant with the inhabitants of the land to which you go, lest it become a bsnare in your midst. 13You shall ctear down their altars and dbreak their pillars and cut down their eAsherim 14(for fyou shall worship no other god, for the Lord, whose name is Jealous, is a jealous God), 15 glest you make a covenant with the inhabitants of the land, and when they hwhore after their gods and sacrifice to their gods and iyou are invited, you eat of his sacrifice, 16and you take of jtheir daughters for your sons, and their daughters kwhore after their gods and make your sons whore after their gods.

Deuteronomy 7:2-3

2 land when the Lord your God gives them over to you, and you defeat them, then you must mdevote them to complete destruction.
That is, set apart ( devote) as an offering to the Lord (for destruction)
oYou shall make no covenant with them and show no mercy to them.
3 pYou shall not intermarry with them, giving your daughters to their sons or taking their daughters for your sons,
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