25 In the day of great slaughter, when the towers fall, streams of water will flow on every high mountain and every lofty hill.

Read Isaiah 30:25 Using Other Translations

And there shall be upon every high mountain, and upon every high hill, rivers and streams of waters in the day of the great slaughter, when the towers fall.
And on every lofty mountain and every high hill there will be brooks running with water, in the day of the great slaughter, when the towers fall.
In that day, when your enemies are slaughtered and the towers fall, there will be streams of water flowing down every mountain and hill.