17 "Then you will know that I, the Lord your God, live in Zion, my holy mountain. Jerusalem will be holy forever, and foreign armies will never conquer her again.

18 In that day the mountains will drip with sweet wine, and the hills will flow with milk. Water will fill the streambeds of Judah, and a fountain will burst forth from the Lord 's Temple, watering the arid valley of acacias. 19 But Egypt will become a wasteland and Edom will become a wilderness, because they attacked the people of Judah and killed innocent people in their land. 20 "But Judah will be filled with people forever, and Jerusalem will endure through all generations. 21 I will pardon my people's crimes, which I have not yet pardoned; and I, the Lord, will make my home in Jerusalem with my people."

Matthew Henry's Commentary on Joel 3:17-21

Commentary on Joel 3:9-17

(Read Joel 3:9-17)

Here is a challenge to all the enemies of God's people. There is no escaping God's judgments; hardened sinners, in that day of wrath, shall be cut off from all comfort and joy. Most of the prophets foretell the same final victory of the church of God over all that oppose it. To the wicked it will be a terrible day, but to the righteous it will be a joyful day. What cause have those who possess an interest in Christ, to glory in their Strength and their Redeemer! The acceptable year of the Lord, a day of such great favour to some, will be a day of remarkable vengeance to others: let every one that is out of Christ awake, and flee from the wrath to come.

Commentary on Joel 3:18-21

(Read Joel 3:18-21)

There shall be abundant Divine influences, and the gospel will spread speedily into the remotest corners of the earth. These events are predicted under significant emblems; there is a day coming, when every thing amiss shall be amended. The fountain of this plenty is in the house of God, whence the streams take rise. Christ is this Fountain; his sufferings, merit, and grace, cleanse, refresh, and make fruitful. Gospel grace, flowing from Christ, shall reach to the Gentile world, to the most remote regions, and make them abound in fruits of righteousness; and from the house of the Lord above, from his heavenly temple, flows all the good we daily taste, and hope to enjoy eternally.