1 Samuel 1:2

That the church which before had been barren should have more children from among the Gentiles than what the synagogue had had before. Isaiah said, "Rejoice, O barren one, that barest not; break forth and shout, who has not been in labor, for the deserted one will have more children than she who has a husband.…" So also, to Abraham, when his first son was born of a bondwoman, Sarah remained long barren, but later, in her old age, bore him her promised son Isaac, who was a type of the Christ. Jacob also took two wives: the elder, Leah, with weak eyes, was a type of the synagogue; the younger and beautiful Rachel, a type of the church, who also remained long barren and afterwards brought forth Joseph, who also was himself a type of Christ. And in 1 Kings [Samuel] it is said that Elkanah has two wives: Peninnah, with her sons; and Hannah, barren, from whom is born not according to the order of generation but according to the mercy and promise of God, when she had prayed in the temple; and Samuel, being born, was a type of Christ. Again in 1 Kings [Samuel]: "The barren has born seven; and she who had many children has grown weak."

In this [figurative] way, therefore, I think the marriages of the elders are interpreted more fittingly; in this way the unions entered by the patriarchs in their now final and weakened age are understood nobly; in this way I hold the necessary begetting of children should be reckoned. For young men are not so well fitted as old men for such marriages and for offspring of this kind. For to the extent that someone is feeble in the flesh, to such an extent will he be stronger in virtue of the soul and more fit for the embraces of wisdom.

(Moral Exposition) Hence he is described as having two wives, because he is joined to the active life through the fruitfulness of good works and to the contemplative life through the love of inner delight. Therefore Peninnah is said to have had children, but Anna is said to have had no children. For what are the children of the active life, except the fruits of good works? And what does it mean that Anna has no children, except that the untrained contemplation does not quickly obtain those joys of inner contemplation which it has already begun to love? Indeed, the joys of inner vision are the children of the contemplative life. But the mind that begins to contemplate eternal things arrives at receiving those joys with all the more difficulty, the more it fails to attend to their beauty. Who then is able to rejoice in the glory of a beauty that he does not see? But the mind that newly raises itself up in the contemplation of eternal goods rises to them all the more slowly, the more it does not quickly lay aside the familiar darkness of its humanity, because while it is unable to cast away worldly cares from itself, it carries dust in its eyes, as it were, by which it cannot see what it desires to see. Therefore the dust must first be cast out from the eye, then the eye must be restored. Dust is indeed cast out when all phantasms of bodily things are removed from the mind's attention, and the eye is restored when by the practice of continual meditation that same attention of the mind is raised up to eternal things. When this has learned through long custom to dwell in heavenly things, by that same length of custom it obtains the purity by which, while it more clearly beholds eternal things, it may more fully exult in their glory. […]

And he had two wives, etc. Anna, whose name means 'grace,' represents the Church: Phenenna, whose name means 'conversion,' demonstrates the synagogue. And fittingly Anna is first, and Phenenna second; because the first times of the world had holy ones, who, living lives similar to …

And Phenenna had children, etc. The synagogue, ever since she was betrothed to the Lord, has never ceased to generate spiritual children for him through teaching. Gentilitas, however, although it never ceased to be subject to his grace in some, albeit few, could not generate …