Charles Spurgeon Commentary Isaiah 26:13-15

"O Jehovah our God, other lords besides thee have had dominion over us; but by thee only will we make mention of thy name. [They are] dead, they shall not live; [they are] deceased, they shall not rise: therefore hast thou visited and destroyed them, and made all remembrance of them to perish. 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 26:13-15 (ASV)

O LORD our God, other lords beside thee have had dominion over us: but by thee only will we make mention of thy name. They are dead, they shall not live; they are deceased, they shall not rise: therefore hast thou visited and destroyed them, and made all their memory to perish. Thou hast increased the nation, O LORD, thou, hast increased the nation: thou art glorified: thou hadst removed it far unto all the ends of the earth.

The Jews were scattered and diminished. When they sinned against God, they were exiled; but when the Lord returned to them in favor, he multiplied them, and brought them home again.