Possible (? couldn’t find this argument anywhere) prefiguration to Mary’s Perpetual Virginity: God chooses the Blessed Virgin Mary to be His spouse and she remains pure and virgin and her lineage remains clean.
Lv 21:14-15 “A widow, or one divorced, or a woman who has been defiled, or a harlot, these he shall not marry; but he shall take to wife a virgin of his own people, that he may not profane his children among his people; for I am the Lord who sanctify him”
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