4 Then David and all Israel went to Jerusalem (which is Jebus); and the Jebusites, the people of the land, were there. 5 And the people of Jebus said to David, You will not come in here. But still, David took the strong place of Zion, which is the town of David. 6 And David said, The first to overcome the Jebusites will be chief and captain. And Joab, the son of Zeruiah, went up first, and became chief.
Matthew Henry's Commentary on 1 Chronicles 11:4-6
Commentary on 1 Chronicles 11:1-9
(Read 1 Chronicles 11:1-9)
David was brought to possess the throne of Israel after he had reigned seven years in Hebron, over Judah only. God's counsels will be fulfilled at last, whatever difficulties lie in the way. The way to be truly great, is to be really useful, to devote all our talents to the Lord.