This chapter reveals many qualities that marked David as an outstanding leader. As Saul continued to decline, God perfected the characteristics of leadership in David that prepared him for the throne. The Amalekites' capture of Ziklag at first looked as if tragedy had struck, but later it proved to be a great blessing. In this respect this event resembled David's whole career. As a result of this victory, the people of Judah came to regard David as the obvious successor to Saul's throne.
The chiastic structure of the chapter focuses attention on the defeat of the Amalekites, the people that God had commissioned Israel's leaders to annihilate.
"A.David reaches destroyed Ziklag and finds it plundered (30:1-3).
B.David and his men are promised the Lord's help (30:4-8).
C.David defeats the Amalekites (30:9-20)
B'.David shares the Lord's plunder with his men (30:21-25).
A'.David returns to Ziklag and distributes the remaining plunder (30:26-31)."287