2 Samuel 10:1-8

Now it happened afterwards that the king of the Ammonites died, and Hanun his son became king in his place. 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?” So Hanun took David’s servants and shaved off half of their beards, and cut off their garments in the middle as far as their hips, and sent them away. When they told it to David, he sent to meet them, for the men were greatly humiliated. And the king said, “Stay at Jericho until your beards grow, and then return.” Now when the sons of Ammon saw that they had become odious to David, the sons of Ammon sent and hired the Arameans 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. When David heard of it, he sent Joab and all the army, the mighty men. The sons of Ammon came out and drew up in battle array at the entrance of the city, while the Arameans of Zobah and of Rehob and the men of Tob and Maacah were by themselves in the field.