Adam Clarke on Song of Solomon 6:13

Return, O Shulamite - This appears to be addressed to the bride, as now the confirmed, acknowledged wife of Solomon; for שולמית shulammith, appears to be a feminine formed from שלמה shelomoh, or Nwmlv shelomon, as we form Charlotte from Charles; Henrietta, from Henry; Janette, from John, etc.

The company of two armies - Or the musicians of the camps. She is as terrible as hosts of armed men, on the ground of what is said on Sol 6:4, Sol 6:5. The two armies may refer to the choirs of the bride's virgins, and the bridegroom's companions; but the similitude is not very perceptible. The Targum explains it of "the camps of Israel and Judah:" as if the bridegroom should say, "My beloved possesses all the perfections both of the Israelitish and Jewish women." But how little satisfaction do the best conjectures afford!

With this chapter the fifth night is supposed to end.