Bonaventure

As for the advantage in preserving he adds: "And if two sleep together, they will warm each other," that is, they will be preserved from the cold: Ephesians 5: "No one has hated his own flesh, but nourishes and cherishes it." The solitary man lacks this benefit: whence he adds: "One alone," if he sleeps, "how will he be warmed?" An example of this: in 3 Kings 1 it is said that David had grown old and could not be warmed, and it is added that they sought Abishag the Shunammite, who slept in the bosom of the king and warmed him: by …

Commentary on Ecclesiastes, Chapter 4 ↗