Gregory the Great — on 1Sam 1:5 (Commentary on 1 Kings, Book 1, Chapter 2)

“(Moral Exposition) The sons of Peninnah are the counsels of the holy mind, which grow through the pursuit of piety in the active life. These sons receive portions with their mother when the counsels of piety grow rich in devotion to good works unto the splendor of heavenly grace. For the pious mind, the more sublimely it is raised in divine contemplation, the more devoutly it extends itself in holy action. For the portions of this mother and her sons are the preparations for holy works. But he gives one portion to the sorrowful Hannah, because through contemplation, by which she desires heavenly things, as long as she is hindered in this misery of time and does not obtain the heavenly things she loves, she has the food of refreshment only in weeping. Indeed, she holds herself fasting whenever, remembering that she is cast out from eternal joys, she cannot weep. Therefore she receives one portion from the sorrowful one, because she is never refreshed according to her desire unless she is satisfied by weeping. The Ephrathite husband gives it to her sorrowfully, who when he gave a portion to Peninnah was not sorrowful, because indeed he rejoices in the preparation of good works, but does not rejoice in joys as long as he is delayed from the heavenly things he loves. Certainly he had given this portion to Hannah, who, seeing himself excluded from eternal goods, spoke saying: "My tears have been my bread day and night, while it is said to me daily: Where is your God?" (Psalm 41:4). But the imperfection of one still beginning is indicated when one wife of the Ephrathite is said to afflict and vehemently distress the other. For in the perfect person, the battle of wives is by no means engaged, since firm experience already knows how to arrange discretely the need for work and the intention for contemplation. For he possesses both wives as if in peace, who neither assigns the times of work to contemplation nor disturbs the leisure of contemplation through the intention of work. (Verse 6) Her rival also afflicted her and vehemently distressed her, to such an extent that she reproached her because the Lord had closed her womb.”