They carried him back on horses and buried him in Jerusalem with his fathers in the City of David.
Here are three kings brought to their graves in these few verses: - 1. Joash king of Israel, Kg2 14:15, Kg2 14:16. We attended his funeral once before, Kg2 13:12, Kg2 13:13. But, because the historian had occasion to give a further account of his life and actions, he again mentions his death and burial. 2. Amaziah king of Judah.
Commenting on 2 Kings 14:15-22
In the fifteenth year of Amaziah, the son of Joash king of Judah, Jeroboam the son of Joash king of Israel began to reign in Samaria,.... So that he reigned fourteen or fifteen years contemporary with him; for Amaziah reigned twenty nine years: and reigned forty and one years; Josephus says (i) forty, giving only the round number. (i) Ut supra, (Antiqu. l. 9.) c. 10. sect. 1.
2Ki 14:20 “They lifted him upon the horses,” i.e., upon the hearse to which the king’s horses had been harnessed, and brought him to Jerusalem, where he was buried with his fathers, i.e., in the royal tomb.