תהילים פט:י פירוש: רש״י

when it raises its waves When its waves are raised.

You humble them Heb. תשבחם, You humble them, and similarly, (Prov. 29:11): “but afterwards a wise man will quiet it (ושבחנה)”; and similarly (above 65:8): “Who humbles (משביח) the roaring of the seas.”