2 Samuel 10:2-3

Then David said, “I will show kindness to Hanun the son of Nahash, just as his father showed kindness to me.” So David sent some of his servants to console him concerning his father. But when David’s servants came to the land of the Ammonites, the princes of the Ammonites said to Hanun their lord, “Do you think that David is honoring your father because he has sent consolers to you? Has David not sent his servants to you in order to search the city, to spy it out and overthrow it?”