2 Samuel 8:4 (BSB)

David captured from him a thousand chariots, seven thousand charioteers, and twenty thousand foot soldiers, and he hamstrung all the horses except a hundred he kept for the chariots.

From 2 Samuel 8. Also in the ESV.

Commentary on 2 Samuel 8:4

• Matthew Henry (Presbyterian), Matthew Henry's Complete Commentary on 2 Samuel 8:1-8: God had given David rest from all his enemies that opposed him and made head against him; and he having made a good use of that rest, has now commission given him to make war upon them, and to act offensively for the avenging of Israel's quarrels and the recovery of their rights; for as yet they were not in full possession of that country...
• John Gill (Reformed Baptist), Exposition of the Old and New Testaments on 2 Samuel 8:4: And David took from him a thousand chariots, and seven hundred horsemen,.... "Chariots" are not in the text here, it is only 1700 "horsemen"; but it is supplied from Ch1 18:4; where the word is expressly mentioned, and there the horsemen are said to be seven thousand as in the Septuagint version here, and in Josephus (m); which may be reconciled by observing, with Kimchi...
• Adam Clarke (Methodist), Clarke's Commentary on the Bible on 2 Samuel 8:4: A thousand chariots - It is strange that there were a thousand chariots, and only seven hundred horsemen taken, and twenty thousand foot. But as the discomfiture appears complete, we may suppose that the chariots, being less manageable, might be more easily taken, while the horsemen might, in general, make their escape. The infantry also seem to have been surrounded, when twenty thousand of them were taken prisoners.
• Keil & Delitzsch (Lutheran), Biblical Commentary on the Old Testament on 2 Samuel 8:3-4: 2Sa 8:3-4 Conquest and Subjugation of the King of Zobah, and of the Damascene Syrians. - 2Sa 8:3. The situation of Zobah cannot be determined. The view held by the Syrian church historians, and defended by Michaelis, viz., that Zobah was the ancient Nisibis in northern Mesopotamia, has no more foundation to rest upon than that of certain Jewish writers who suppose it to have been Aleppo, the present Haleb.