2 Samuel 10:2-4

2David said, “I am going to show loyalty to Hanun just as his father, Nahash, was always loyal to me.” So David sent ambassadors to express sympathy to Hanun about his father’s death. But when David’s ambassadors arrived in the land of Ammon,

3the Ammonite commanders said to Hanun, their master, “Do you really think these men are coming here to honor your father? No! David has sent them to spy out the city so they can come in and conquer it!”

4So Hanun seized David’s ambassadors and shaved off half of each man’s beard, cut off their robes at the buttocks, and sent them back to David in shame.