This passage comes chronologically after passages from 1 Samuel (22, 27, 29) and 2 Samuel (4:12). David had men from many different groups join him at Ziklag while he was in hiding from Saul. Some Benjamiites who used slings and bows ambidextrously, some Gadites who could handle spear and shield, and had faces of lions, and some Benjamites and men of Judah all came to meet David at his stronghold. David made them declare their intentions, and Amasai declared,
“We are yours, O David;
We are on your side, O son of Jesse!
Peace, peace to you,
And peace to your helpers!
For your God helps you.”
So David received them, and made them captains of the troop. Some form Manasseh came to David while he went to fight with the Philistines against Saul. However, the Philistines sent Davis away, fearing he would defect to Saul. More men came day by day to help him, until he had a great army.
The men who came to David at Ziklag totalled over 300,000 warriors. They came to Hebron to make David king. They brought food and drink, and feasted for three days.
This passage clearly establishes how David’s influence and example drew numerous soldiers to him, standing with him instead of Saul. This was a true testament to his leadership.