I will also gather all nations, and will bring them down into the {b} valley of Jehoshaphat, and will plead with them there for my people and for my heritage Israel, whom they have scattered among the nations, and parted my land.

(b) It appears that he alludes to the great victory of Jehoshaphat, whom God used without man's help to destroy the enemies, 2Ch 20:20-26; also he is referring to this word Jehoshaphat, which signifies pleading or judgment, because God would judge the enemies of his Church, as he did there.

Wesley's Notes

3:2 All nations - In the type it is all those nations that have oppressed Judah, in the anti - type, all nations that have been enemies to Christ and the church. Into the valley of Jehoshaphat - I will debate my people's cause, and do them right in the midst of my church, signified by the valley of Jehoshaphat. Parted my land - Such is the injustice of the persecutors of the church now, and so God will judge them in due time.

Jamieson-Fausset-Brown Bible Commentary

2. Parallel to Zec 14:2, 3, 4, where the "Mount of Olives" answers to the "Valley of Jehoshaphat" here. The latter is called "the valley of blessing" (Berachah) (2Ch 20:26). It lies between Jerusalem and the Mount of Olives and has the Kedron flowing through it. As Jehoshaphat overthrew the confederate foes of Judah, namely, Ammon, Moab, &c. (Ps 83:6-8), in this valley, so God was to overthrow the Tyrians, Zidonians, Philistines, Edom, and Egypt, with a similar utter overthrow (Joe 3:4, 19). This has been long ago fulfilled; but the ultimate event shadowed forth herein is still future, when God shall specially interpose to destroy Jerusalem's last foes, of whom Tyre, Zidon, Edom, Egypt, and Philistia are the types. As "Jehoshaphat" means "the judgment of Jehovah," the valley of Jehoshaphat may be used as a general term for the theater of God's final judgments on Israel's foes, with an allusion to the judgment inflicted on them by Jehoshaphat. The definite mention of the Mount of Olives in Zec 14:4, and the fact that this was the scene of the ascension, makes it likely the same shall be the scene of Christ's coming again: compare "this same Jesus . shall so come in like manner as ye have seen Him go into heaven" (Ac 1:11).

all nations-namely, which have maltreated Judah.

plead with them-(Isa 66:16; Eze 38:22).

my heritage Israel-(De 32:9; Jer 10:16). Implying that the source of Judah's redemption is God's free love, wherewith He chose Israel as His peculiar heritage, and at the same time assuring them, when desponding because of trials, that He would plead their cause as His own, and as if He were injured in their person.

Matthew Henry's Concise Commentary

3:1-8 The restoration of the Jews, and the final victory of true religion over all opposers, appear to be here foretold. The contempt and scorn with which the Jews have often been treated as a people, and the little value set upon them, are noticed. None ever hardened his heart against God or his church, and prospered long.