Some trust in chariots, and some in horses. The enemies of David towards the north—Syrians of Zobah, and Maachah, and Damascus, and Beth-Rehob—were especially formidable on account of their cavalry and their chariots.
David on one occasion "took from Hadarezer, King of Zobah, a thousand chariots, and seven thousand horsemen" (1 Chronicles 18:4). On another he "slew of the Syrians seven thousand men which fought in chariots" (1 Chronicles 19:18).
His own troops appear to have consisted entirely of footmen. But we will remember the Name of the Lord our God. Our trust, i.e; shall be in the Lord, who has commanded our kings "not to multiply horses" (Deuteronomy 17:16).