Ambrose of Milan

"Arise, come to me, my love," that is, rise from worldly pleasures, rise from earthly things, and come to me, who are still laboring and burdened, because you are anxious for the things of the world. Come above the world, come to me, for I have conquered the world. Come near to me now, beautiful with the beauty of eternal life, now a dove, that is, gentle and meek, now completely full of spiritual grace. …

On Isaac and the Soul, 4.34-35 ↗

Jerome

Then the bridegroom makes answer to the bride and teaches her that the shadow of the old law has passed away and the truth of the gospel has come. "Rise up, my love, my fair one, and come away, for lo, the winter is past, the rain is over and gone." … "The voice of the turtle [dove] is heard in our land." The turtle [dove], the most chaste of birds, always dwelling in lofty places, is a type of the Savior.

Against Jovinianus 1.30 ↗

Bede

"Arise, my love, my fair one, and come away," etc. If, according to the Apostle's exposition, the Rock was Christ (1 Corinthians 10), what are the clefts of the rock except the wounds which Christ received for our salvation? In these very clefts the dove resides and nests, whether each meek soul or the entire Church, places its sole hope of salvation in the Lord's passion, relying on the sacrament of his death to protect themselves, as if from the snatching of a hawk by an ancient enemy, and strives to bring forth spiritual …

Commentary on the Song of Songs ↗