See Gill "1Ch 19:1".
Related Commentaries of 1 Chronicles 19:6
1 Chronicles 19:6
6 And when the children of Ammon saw that they had made themselves odiousb to David, Hanun and the children of Ammon sent a thousand talents of silver to hire them chariots and horsemen out of Mesopotamia, and out of Syriamaachah, and out of Zobah.