2 Samuel 10:1-6

Now it happened later that [Nahash] the king of the Ammonites died, and his son Hanun became king in his place. Then David said, “I will show kindness to Hanun the son of Nahash, just as his father did to me.” So David sent [a letter along with] some of his servants to console him in regard to his father’s death; and David’s servants came into the land of the Ammonites. But the princes of the Ammonites [were suspicious and] said to Hanun their lord, “Do you think that David is honoring your father because he has sent comforters to you? Has David not sent his servants to you in order to search the city, to spy it out and overthrow it?” So Hanun took David’s servants and shaved off half their beards, and cut off their robes in the middle as far as their hips, and sent them away. When David was informed, he sent [messengers] to meet them [before they reached Jerusalem], for the men were greatly ashamed and humiliated. And the king said, “Stay at Jericho until your beards grow, and then return.” When the Ammonites saw that they had become an object of hatred to David, they sent word and hired the Arameans (Syrians) of Beth-rehob and the Arameans of Zobah, 20,000 foot soldiers, and the king of Maacah with 1,000 men, and the men of Tob with 12,000 men [to fight for them].