1 Chronicles 19:2-6

Then David said, “I will show kindness to Hanun the son of Nahash, because his father showed kindness to me.” So David sent messengers to console him concerning his father. And David’s servants came into the land of the sons of Ammon to Hanun to console him.

But the commanders among the sons of Ammon said to Hanun, “Do you think that David is honoring your father, in that he has sent comforters to you? Have his servants not come to you to search, to demolish, and to spy out the land?”

So Hanun took David’s servants and shaved them, and cut off their robes in the middle as far as their buttocks, and sent them away.

Then certain people went and told David about the men. And he sent messengers to meet them, because the men were very humiliated. And the king said, “Stay at Jericho until your beards grow back, then return.”

When the sons of Ammon saw that they had made themselves repulsive to David, Hanun and the sons of Ammon sent a thousand talents of silver to hire for themselves chariots and horsemen from Mesopotamia, Aram-maacah, and Zobah.