Cyril of Jerusalem

"Your teeth are like a flock of ewes to be shorn." A sincere confession is a spiritual shearing! And further: "all of them big with twins," signifying the twofold grace, either that perfected by water and the Spirit, or that announced in the Old and in the New Testament.

Catechetical Lecture 3:16 ↗

Augustine of Hippo

"Your teeth are like a flock of shorn ewes." What do shorn ewes mean? Those who lay aside secular burdens. What does shorn mean? Those who lay aside their fleeces, like the load of secular burdens. Those persons were your teeth, about whom it is written in the Acts of the Apostles that "they sold all their possessions and laid the proceeds at the feet of the apostles, so that distribution might be made to each, as there was need." You have received the fleeces of your shorn ewes. …

Sermon 313B.3 ↗

Ambrose of Milan

[There is a] pleasing comparison to those that are shorn; for we know that goats both feed in high places without risk and securely find their food in rugged places, and then when shorn are freed from what is superfluous. The church is likened to a flock of these, having in itself the many virtues of those souls which through the laver lay aside the superfluity of sins and offer to Christ the mystic faith and the grace of good living, which speak of the cross of the Lord Jesus.

On the Mysteries 7:38 ↗

Bede

All bear twin offspring, etc. The sheep of Christ bear twin offspring, because all whom the holy teachers bring to God through preaching, they instruct in the twin love of the same God and neighbor. They bear twins, because they imbue the disciples whom they instruct with the knowledge of faith and good works. And there is none barren among them: there is no sheep of the supreme shepherd which does not produce offspring of good work; among whom there are many who rejoice in the offspring of both work and doctrine. …

Commentary on the Song of Songs ↗