Charles Ellicott Commentary 1 Samuel 30:16

"And when he had brought him down, behold, they were spread abroad over all the ground, eating and drinking, and dancing, because of all the great spoil that they had taken out of the land of the Philistines, and out of the land of Judah." — 1 Samuel 30:16 (ASV)

Spread abroad upon all the earth, eating and drinking and dancing. —We have here a vivid picture of the wild license which these barbarians allowed themselves, now that they were secure, as they thought, from all pursuit.

When the picked warriors of David’s troops looked on the scene of revelry and debauch, and thought who were among the captives in that disorderly encampment, and remembered what homes had been made desolate to provide much of that great spoil over which Amalek was rejoicing, we may well conceive with what strength and fury the little veteran force of Israelites fell upon these desert robbers, who evidently far outnumbered them.