Joel 3:18

Joel continued describing the future day of the Lord, but now he passed from the judgments of the Tribulation to the blessings of the Millennium. The mountains of Israel would be so full of grapevines that they could be described as dripping with wine. There will be so many milk-yielding animals feeding on the luxuriant hills that the hills could be said to flow with milk. Instead of the wadis that have water in them only a few days each year, the streams of Judah would flow with abundant, life-giving water. All these descriptions recall conditions in paradise (cf. Joel 1:5; Joel 1:18; Joel 1:20). A spring will flow out from the millennial temple that will water the valley of acacia trees, evidently between Jerusalem and the Dead Sea (cf. Ezekiel 47:1-12; Zechariah 14:8). This will also be a visual reminder that Yahweh is the source of all provisions and fruitfulness.

"Jerusalem is the only city of antiquity that wasn’t built near a great river. Rome had the Tiber; Nineveh was built near the Tigris and Babylon on the Euphrates; and the great Egyptian cities were built near the Nile. But in the kingdom, Jerusalem will have a river that proceeds from the temple of God." [Note: Wiersbe, p. 340.]