1 Chronicles 19:3-4

3But the leaders of the Ammonites said to Hanun, ‘David has sent his officers to you with a kind message. But do not think that he really wants to give honour to your father. No, he has sent his men to look at our land. They want to see how they can attack our country and take it for themselves.’

4So Hanun took hold of David's officers. He cut off their hair. He also cut off the lower half of their clothes up to their hips. Then he sent them away.