Amaziah struck down 10,000 Edomites in the Valley of Salt. He took Sela in battle and called it Joktheel, which is its name to this very day.
Amaziah, the son and successor of Joash, is the king whom here we have an account of. Let us take a view of him, I. In the temple; and there he acted, in some measure, well, like Joash, but not like David, Kg2 14:3.
Commenting on 2 Kings 14:1-7
And Jehoash the king of Israel sent to Amaziah the king of Judah,.... By the return of his messengers: saying, the thistle that was in Lebanon sent to the cedar that was in Lebanon; intending by this proverbial way of speaking to humble the pride of Amaziah; comparing him to a thistle or thorn, a low, mean, abject, weak, prickly, and troublesome shrub, and himself...
HE SMITES EDOM. (Kg2 14:7) He slew of Edom in the valley of salt ten thousand--In the reign of Joram the Edomites had revolted (see Kg2 8:20). But Amaziah, determined to reduce them to their former subjection, formed a hostile expedition against them, in which he routed their army and made himself master of their capital.