Matthew Poole and continuators on Exodus 34:15

15 Lest thou make a covenant with the inhabitants of the land, and they go a whoring after their gods, and do facrifice unto their gods, and one call thee, and thou eat of his sacrifice .

For cohabitation, or to suffer them quietly to live among you whom you should drive out.

(i. e.) Commit Idolatry, which is oft called and compared to spiritual whoredom. See Ier. 2. and 3. and Ezek. 16.

To wit, of the parts or remainders of his sacrifices, whereby thou wilt partake with him in an idolatrous worship, because such feasts were a part of the Worship offered to the Idol, and were accompanied with solemn benedictions and thanksgivings to the Idol. See Numb. 25. 2. Psal. 106. 28. Ezek. 18. 6. and 22. 9. 1 Cor. 10. 20. Rev. 2. 20.