1 Chronicles 19:2-5

2And David said, “I will show kindness to Hanun son of Nahash, because his father showed kindness to me.”

So David sent messengers to console Hanun concerning his father. But when David’s servants arrived in the land of the Ammonites to console him, 3the princes of the Ammonites said to Hanun, “Just because David has sent you comforters, do you really believe he is showing respect for your father? Have not his servants come to you to explore the land, spy it out, and overthrow it?”

4So Hanun took David’s servants, shaved their beards, cut off their garments at the hips, and sent them away.

5When someone came and told David about his men, he sent messengers to meet them, since the men had been thoroughly humiliated. The king told them, “Stay in Jericho until your beards have grown back, and then return.”