Isaiah 57:20

Isaiah 57:20. But the wicked are like the troubled sea, when it cannot rest, whose waters cast up mire and dirt.

"Work up" such is the word - "whose waters work up mire and dirt" continually, as it were, in a 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.