Charles Spurgeon Commentary Isaiah 26:15

"Thou hast increased the nation, O Jehovah, thou hast increased the nation; thou art glorified; thou hast enlarged all the borders of the land." — Isaiah 26:15 (ASV)

You have increased the nation, O LORD, you have increased the nation: you are glorified:

God is always glorified in the increase of his people; therefore, we should, above all other reasons, pray for the increase of the Church because God will be glorified by this.