Amaziah would not hear, because God blinded and hardened him to his destruction, for his abominable and ridiculous idolatry, 2 Chronicles 25:20. Jehoash went up, to wit, into the kingdom of Judah, carrying the war into his enemy's country. Which belongeth to Judah; which is added to distinguish it from that Beth-shemesh in Issachar, and another in Naphtali, Joshua 19:22,38.
Related Commentaries of 2 Kings 14:11
2 Kings 14:11
11 But Amaziah would not hear. Therefore Jehoash king of Israel went up; and he and Amaziah king of Judah looked one another in the face at Bethshemesh, which belongeth to Judah.