The song of songs, which is Solomon's.
The Song of songs - the most excellent of all songs, Hebrew idiom (Deuteronomy 10:14). A foretaste on earth of the "new song" to be sung in glory (Revelation 5:9).
Solomon's - "King of Israel," or "Jerusalem," is not added, as in the opening of Proverbs and Ecclesiastes; not because Solomon had not yet ascended the throne (Moody Stuart), but because his personality is hid under that of Christ, the true Solomon (i:e., Prince of Peace). The earthly Solomon is not introduced, which would break the consistency of the allegory. Though the bride bears the chief part, the Song throughout is not her's, but that of her "Solomon." He animates her. He and she, the Head and the members, form but one Christ. Aaron prefigured Him as priest; Moses, as prophet; David, as a suffering king; Solomon, as the triumphant prince of peace. The camp in the wilderness represents the Church in the world; the peaceful reign of Solomon, after all enemies had been subdued, represents the Church in heaven, of which joy the Song gives a foretaste.