Then the Syrians fled before Israel; and David killed seven hundred charioteers and forty thousand horsemen of the Syrians, and struck Shobach the commander of their army, who died there — 2 Samuel 10:18, NJKV
(David killed seven hundred (700) charioteers and forty thousand “horsemen”)

   Contradicted by:   

Then the Syrians fled before Israel; and David killed seven thousand charioteers and forty thousand foot soldiers of the Syrians, and killed Shophach the commander of the army — 1 Chronicles 19:18, NKJV
(David killed seven thousand (7,000) charioteers and forty thousand “foot soldiers”)