Adam Clarke on Song of Solomon 3:6

Who is this that cometh out of the wilderness - Going to Egypt was called descending or going down, coming from it was termed coming up. The bride, having risen, goes after her spouse to the country, and the clouds of incense arising from her palanquin seemed like pillars of smoke; and the appearance was altogether so splendid as to attract the admiration of her own women, who converse about her splendor, excellence, etc., and then take occasion to describe Solomon's nuptial bed and chariot. Some think that it is the bridegroom who is spoken of here. With this verse the third night is supposed to end.