Matthew Poole and continuators on 1 Samuel 30:13

13 And David said unto him, To whom belongest thou? and whence art thou? And he said, I am a young man of Egypt , servant to an Amalekite, and my master left me , because three days agone I fell sick.

God by his Providence so ordering it, that he was not one of that Cursed Race of the Amalekites, who were to be utterly destroyed, but an Egyptian, who might be spared.

In this place and condition: which was barbarous inhumanity: for he ought, and easily might have carried him away with the Prey which they had taken. But he paid dear for this cruelty, for this was the occasion of the ruin of him and of all their company▪ And God by his secret Providence ordered the matter thus for that very end. So that there is no Fighting against God, who can make the smallest accidents serviceable to the production of the greatest effects.