Numbers 25:18 - Matthew Poole's English Annotations on the Holy Bible

For under pretence of kindred, and friendship, and leagues, yea, and marriages, which they offered to them, instead of that war which the Israelites expected from them, they sought only an opportunity to insinuate themselves into their familiarity, and execute their hellish plot of bringing that curse upon the Israelites, which they had in vain attempted to bring another way. In the matter of Peor, and in the matter of Cozbi; by drawing you both to spiritual and corporal whoredom. Their sister, in a large sense, to wit, their countrywoman.