The lectionary text needs the rest of the chapter for a complete understanding of David's accession, especially as that is revealed in the paneled structure of 2 Samuel 5:
A David anointed as king over Israel (vv. 1-3)
B Statistics of David's reign (vv. 4-5)
C David defeats the Jebusites (vv. 6-8)
X God establishes David as king in Jerusalem (vv. 9-12a)
A′ David's kingdom exalted (v. 12b)
B′ Statistics of David's family (vv. 13-16)
C′ David defeats the Philistines (vv. 17-25)
Structurally, acclamation for David or his kingdom (vv. 1-3; 12b) is followed by pertinent statistical information (vv. 4-5; 13-16) and accounts of David's military success (vv. 6-8; 17-25). The theologically significant matter of Jerusalem becoming the political and ultimately the religious center of the empire anchors the text, along with references to the divine favor David enjoyed (vv. 9-12a). Theologically important points include the following:
1. The elders of Israel came to David at Hebron in the south, thus demonstrating their acceptance of God's decree that David would rule Israel (v. 2; see 1 Samuel 25:30). The unification of the tribes only exists in their mutual acceptance of David as king; a unification that will rupture upon the death of Solomon (1 Kings 12).
2. David's choice of Jerusalem for his capitol was politically astute. Jerusalem had ties with neither the north nor the south and was somewhat centrally located between those two entities. In addition, it already boasted an infrastructure that David could utilize to his own political advantage. It was truly "the city of David" (v. 9). Later, David's transfer of the ark to Jerusalem would consolidate the city religiously (chapter 6).
3. David's defeat of the Jebusites and capture of their city is matched with a dual victory over the Philistines who may have perceived David's unification of Judah and Israel as a threat (vv. 17-25), although, historically speaking, most interpreters are convinced that these battles preceded the conquest of Jerusalem. They are arranged in this literary pattern to lift up the theological significance of David's accession rather than its chronological order.
4. Most important, each of the three sections (vv. 1-8, 9-12a, and 12b-25) includes at least one reference to the divine favor David enjoyed:
5Then all the tribes of Israel came to David at Hebron, and said, Look, we are your bone and flesh. 2For some time, while Saul was king over us, it was you who led out Israel and brought it in. The Lord said to you: It is you who shall be shepherd of my people Israel, you who shall be ruler over Israel. 3So all the elders of Israel came to the king at Hebron; and King David made a covenant with them at Hebron before the Lord, and they anointed David king over Israel. 4David was thirty years old when he began to reign, and he reigned for forty years. 5At Hebron he reigned over Judah for seven years and six months; and at Jerusalem he reigned over all Israel and Judah for thirty-three years.
6 The king and his men marched to Jerusalem against the Jebusites, the inhabitants of the land, who said to David, You will not come in here, even the blind and the lame will turn you backthinking, David cannot come in here. 7Nevertheless, David took the stronghold of Zion, which is now the city of David. 8David had said on that day, Whoever wishes to strike down the Jebusites, let him get up the water shaft to attack the lame and the blind, those whom David hates.* Therefore it is said, The blind and the lame shall not come into the house. 9David occupied the stronghold, and named it the city of David. David built the city all around from the Millo inwards. 10And David became greater and greater, for the Lord, the God of hosts, was with him.
New Revised Standard Version Bible: Anglicized Edition, copyright © 1989, 1995 National Council of the Churches of Christ in the United States of America. Used by permission. All rights reserved worldwide. http://nrsvbibles.org