Then the LORD became jealous for His land, and He spared His people.
The Prophet here again repeats, that prayers would not be in vain, provided the Jews truly humbled themselves before God. Then God, he says, will be jealous for his land and spare his people. He confirms what I have already said that God would deal mercifully with his people, because they were his heritage, that is because he had chosen them for himself.
See how ready God is to succour and relieve his people, how he waits to be gracious; as soon as ever they humble themselves under this hand, and pray, and seek his face, he immediately meets them with his favours.
Commenting on Joel 2:18-27
Then will the Lord be jealous for his land,.... Or "zealous" for it; for the honour of it, and the good of its inhabitants, and for the glory of his own name, it being the chief place in the world for his worship and service; and his indignation will be moved against those who have brought desolation on it: and pity his people; as a...