The LORD is taking his place to argue his case; he's standing up to judge the people.

At that time, as to the root of Jesse, who will be standing as a banner for the nations, the nations will rally to him, and his resting place is glorious.

it will be as if harvesters gather standing grain, reaping the ears by hand, or it will be as if grain is harvested in the valley of Rephaim.

By this, then, Jacob's guilt will be atoned for, and this will be the full harvest that comes from the removal of his sin: when he makes all the altar stones like pulverized chalkstones, no Asherah poles or incense altars will be left standing.