The narrative here given fills out a manifest defect in 2 Samuel 5:8 where something has evidently dropped out of the text.
The prowess of Joab on this occasion, and the part which he took in the building of the city of David 1 Chronicles 11:8, are known to us only from this passage of Chronicles.
6 And David said, Whosoever smiteth the Jebusites first shall be chiefc and captain. So Joab the son of Zeruiah went first up, and was chief.
7 And David dwelt in the castle; therefore they called it the city of David.
8 And he built the city round about, even from Millo round about: and Joab repairedd the rest of the city.