1st Chronicles Chapter 19 American Standard-ASV1901
And David said, I will show kindness unto Hanun the son of Nahash, because his father showed kindness to me. So David sent messengers to comfort him concerning his father. And David's servants came into the land of the children of Ammon to Hanun, to comfort him.
But the princes of the children of Ammon said to Hanun, Thinkest thou that David doth honor thy father, in that he hath sent comforters unto thee? are not his servants come unto thee to search, and to overthrow, and to spy out the land?
Then there went certain persons, and told David how the men were served. And he sent to meet them; for the men were greatly ashamed. And the king said, Tarry at Jericho until your beards be grown, and then return.
And when the children of Ammon saw that they had made themselves odious 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 Arammaacah, and out of Zobah.
So they hired them thirty and two thousand chariots, and the king of Maacah and his people, who came and encamped before Medeba. And the children of Ammon gathered themselves together from their cities, and came to battle.
And when the Syrians saw that they were put to the worse before Israel, they sent messengers, and drew forth the Syrians that were beyond the River, with Shophach the captain of the host of Hadarezer at their head.
And it was told David; and he gathered all Israel together, and passed over the Jordan, and came upon them, and set the battle in array against them. So when David had put the battle in array against the Syrians, they fought with him.
And when the servants of Hadarezer saw that they were put to the worse before Israel, they made peace with David, and served him: neither would the Syrians help the children of Ammon any more.