Ruth 1:4 - Matthew Poole's English Annotations on the Holy Bible

Of the women of Moab; either these were proselytes when they married them, which may well be doubted, from Ruth 1:15, or they sinned in marrying them, as appears from Deuteronomy 7:3, Deuteronomy 23:3 Ezra 9:1,2 Ne 13:23, and therefore were punished with short life and want of issue, Ruth 1:5,19,21. About ten years; as long as the famine lasted.