Albert Barnes Commentary Song Of Solomon 4:4

"Thy neck is like the tower of David builded for an armory, Whereon there hang a thousand bucklers, All the shields of the mighty men." — Song Of Solomon 4:4 (ASV)

The “tower of David” may be the one mentioned in Nehemiah 3:25-27 and Micah 4:8. For the custom of hanging shields and other weapons in and on buildings suited for the purpose, see Ezekiel 27:10-11.