2 Samuel 10:3-5

10:3 the Ammonite officials said to their lord Hanun, “Do you really think David is trying to honor your father by sending these messengers to express his sympathy? No, David has sent his servants to you to get information about the city and spy on it so they can overthrow it!”

10:4 So Hanun seized David’s servants and shaved off half of each one’s beard. He cut the lower part of their robes off so that their buttocks were exposed, and then sent them away. 10:5 Messengers told David what had happened, so he summoned them, for the men were thoroughly humiliated. The king said, “Stay in Jericho until your beards have grown again; then you may come back.”