2 Kings 14:13

took Amaziah i.e. Took him prisoner. And there is some difficulty in deciding what became of Amaziah at this time and afterwards. In 2 Chronicles 25:23 it is added that Jehoash brought him to Jerusalem, and the Kethib(they came) in this verse is intended to give that idea. Both A.V. and R.V. have translated the Keri(he came). Josephus (Ant.IX. 9. 3) has given an account which makes Amaziah be brought as a captive into his own capital. -When the troops (of Judah) were scattered in alarm, Amaziah was left alone and was taken prisoner by the enemy. Then Jehoash threatened to put him to death unless he persuaded the people of Jerusalem to open their gates and admit him with his army into the city. And Amaziah through necessity and in fear for his life caused the enemy to be received. And Jehoash having broken down about four hundred cubits of the walls, drove in his chariot through the opening into Jerusalem, bringing Amaziah as his prisoner." This is a picture in which the imagination has added to the details of the sacred narrative. Yet the very formal way in which Amaziah is mentioned in this verse, both here and by the Chronicler, as -Amaziah king of Judah, the son of Jehoash the son of Ahaziah", seems to indicate that some crisis in the reign of this king is marked by the defeat at Beth-shemesh. Perhaps he was kept a prisoner till the death of Jehoash. The way in which it is said in verse 17 that Amaziah lived(not reigned) after the death of Jehoash, seems also, from its unusual nature, to mark an exceptional state of things.

from the gate of Ephraim This portion of the wall was on the north of the city, opening towards the kingdom of Israel, and the demolition of a large part of the wall on that side was meant to leave the city exposed to the entry of the Israelites if they were desirous to come in. The gate was where now is -the Damascus gate".