Nothing was missing, young or old, son or daughter, or any of the plunder the Amalekites had taken. David brought everything back.
Solomon observes that the righteous is delivered out of trouble and the wicked cometh in his stead, that the just falleth seven times a-day and riseth again; so it was with David. Many were his troubles, but the Lord delivered him out of them all, and particularly out of this of which we have here an account. I.
Commenting on 1 Samuel 30:7-20
And there was nothing lacking to them, neither small nor great, neither sons nor daughters,.... Not any of the least or youngest, nor any of them that were grown up; for as these were not slain but carried captive, so they were brought back, and not one missing, see Sa1 30:2, neither spoil, nor any thing they had taken to them: except the food they...
AND RECOVERS HIS TWO WIVES AND ALL THE SPOIL. (1Sa. 30:16-31) they were spread abroad upon all the earth--Believing that David and all his men of war were far away, engaged with the Philistine expedition, they deemed themselves perfectly secure and abandoned themselves to all manner of barbaric revelry. The promise made in answer to the devout inquiries of David (Sa1 30:8) was fulfilled. The marauders were surprised and panic-stricken.
Commenting on 1 Samuel 30:16-31