Charles Spurgeon Commentary Isaiah 57:20

"But the wicked are like the troubled sea; for it cannot rest, and its waters cast up mire and dirt." — Isaiah 57:20 (ASV)

But the wicked are like the troubled sea, when it cannot rest, whose waters cast up mire and dirt.

The word is 'work up'—whose waters work up mire and dirt continually, as it were, at this work, and bringing up its filthiness from the bottom—bringing it to the shore—taking away the brightness from every wave and the crystal blue from every drop. Its waters cast up mire and dirt.