Charles Ellicott Commentary Genesis 14:17

"And the king of Sodom went out to meet him, after his return from the slaughter of Chedorlaomer and the kings that were with him, at the vale of Shaveh (the same is the King`s Vale)." — Genesis 14:17 (ASV)

The slaughter. —Hebrew, the smiting, that is, the defeat of Chedorlaomer.

The valley of Shaven. —That is, the valley of the plain . It was the place where Absalom erected his pillar (2 Samuel 18:18) and lay on the northern side of Jerusalem, probably where the Kedron valley widens out.

Its other name, “the king’s dale,” may have been given to it from this meeting of the kings of Salem and Sodom with the victorious Abram. However, Onkelos, with far greater probability, considers that it was so called because on this level ground the kings of Judah in subsequent times assembled and exercised their forces.