1 Samuel 30:13

“And David said unto him, to whom [belongest] thou? etc.] To what country or people? and to whom among them? and whence [art] thou? of what nation? where wast thou born? what countryman art thou? for his being called an Egyptian before seems to be by anticipation, unless it was guessed at by his habit; for until he had eaten and drank he could not speak, and so could not be known by his speech: for he said, I [am] a young man of Egypt; that was the country he belonged to, and came from; he was an Egyptian by birth: servant to an Amalekite; one of those that had invaded the country, and burnt Ziklag, as it follows: and my master left me, because three days agone I fell sick; which was very…”

“Egypt - 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. Left me - 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 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. 1 Kings (1 Samuel) 30:14”

“30:13 because I was sick: Only healthy and vigorous slaves were valuable to the Amalekites; the rest were expendable.”

“my master: Though they had booty enough, and this poor sick slave might have been carried on an ass or a camel, yet they inhumanely left him to perish; but, in the righteous providence of God, this cruelty was the occasion of their destruction; whilst David's kindness to a perishing stranger and slave was the means of his success, and proved the truest policy. Job 31:13-15; Pro 12:10; Jam 2:13 1 Kings (1 Samuel) 30:14”

“When David asked him whence he had come (to whom, i.e., to what people or tribe, dost thou belong?), the young man said that he was an Egyptian, and servant of an Amalekite, and that he had been left behind by his master when he fell sick three days before ("to-day three," sc., days): he also said, "We invaded the south of the Crethites, and what belongs to Judah, and the south of Caleb, and burned Ziklag with fire." הכּרתי, identical with כּרתים ( Eze 25:16; Zep 2:5), denotes those tribes of the Philistines who dwelt in the south-west of Canaan, and is used by Ezekiel and Zephaniah as synonymous with Philistim. The origin of the name is involved in obscurity, as the explanation which…”