Bede

On that day, it was read from the book of Moses, etc. It is evident that the Moabites and Ammonites, because they were born of incest, hold the figure of the heretics, whose founders, while they corrupt the doctrine of the fathers, from which they themselves were taught, by misunderstanding it, use it as if the daughters of Lot secretly and in the dark used their father's seed, and not lawfully: therefore the progeny of such, that is, the followers of heresies, can never have any part in the Church of the Lord. …

Commentary on Ezra and Nehemiah ↗