Deuteronomy 20:7
And what man is there that hath betrothed a wife, and hath not taken her? let him go and return unto his house, lest he die in the battle, and another man take her.
And what man is there that hath betrothed a wife, and hath not taken her?.... Home to his house and bedded with her; has only betrothed her, but is not properly married to her, the nuptials are not completed; this the Jews understand of anyone betrothed to him, whether a virgin or a widow, or the wife of a deceased brother (yea, they say, if his brother is dead in war, he returns and comes home), but not of a former wife divorced and received again {m}:
let him go and return unto his house, lest he die in battle, and another man take her; or marry her.
{m} Misn. Sotah, ib. sect. 2.