When it was told David, he gathered all Israel, crossed over the Jordan and came upon them, and set up in battle array against them. So when David had set up in battle array against the Syrians, they fought with him.
1 Chronicles 19:17
Surrounding context
19:16 Now when the Syrians saw that they had been defeated by Israel, they sent messengers and brought the Syrians who were beyond the River, and Shophach the commander of Hadadezer's army went before them.
19:17 When it was told David, he gathered all Israel, crossed over the Jordan and came upon them, and set up in battle array against them. So when David had set up in battle array against the Syrians, they fought with him.
19:18 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.