Musar for Exodus 27:9

We have now learned that the three parts of the Tabernacle correspond to the three parts of the universe concerning which King David said in Psalms 103,20: "Bless the Lord, O, His angels, mighty creatures who do His bidding, ever obedient to His bidding. Bless the Lord all His hosts, His servants who do His will; bless the Lord all His works, through the length and breadth of His realm." David's son Solomon also adopted his father's outlook when he alluded to this in three consecutive verses in Song of Songs 5,13-15. Three different parts of the human body form the subject of those verses, each one representing a different aspect of the universe and how man's composition reflects this division of the universe into three constituent parts. I (Rabbenu Bachyah) have explained this in detail when I discussed Jacob's dream of the ladder." Thus far the quotation from Rabbenu Bachyah.