Bede

As long as the king is at his recline. That is, as long as Christ is in his secret, and has not yet appeared to us in the glory of his Father, to render to each according to his work. Then indeed, as Isaiah says: "The eyes of the saints will see the king in his beauty" (Isaiah XXXIII). And hence the Apostle also says: "Your life is hidden with Christ in God. When Christ, our life, appears, then you also will appear with him in glory" (Colossians VIII). …

Commentary on the Song of Songs ↗

Bernard of Clairvaux

SERMON 42 — FRATERNAL CORRECTION: TWO KINDS OF HUMILITY "While the king was on his couch, my nard gave forth its fragrance." These are the bride's words that we have left until today. This is the answer she gave when rebuked by the Bridegroom, not to the Bridegroom however but to his companions, as can easily be gathered from the words themselves. For since she does not address him directly and say: "When you were on your couch, O King," but: "when he was on his couch," it is clear that she does not speak to him but of him. …

Sermons on the Song of Songs, Sermon 42 ↗

Robert of Tombelaine

The king then entered his couch, when our Lord Jesus Christ bodily penetrated the interior of heaven. While he rested there, the nard of the bride gave forth its fragrance; because the virtue of the holy Church spread the sweet fame of its goodness far and wide. For the Lord ascended to heaven and sent his Holy Spirit upon the disciples (Acts II); filled with whom, they preached the words of salvation to the world, and through holy works spread the fame of good fragrance all around. …

Commentary on the Song of Songs, Chapter 1 ↗