איוב מא:כג פירוש: רש״י

He makes the deep seethe like a pot Like a small bubbling pot, that quickly raises bubbles one after another, so does he cause the deep, which is large and deep, to seethe.

he makes the sea like a seething mixture Like a mixture of a concoction of spices, which is compounded and mixed, so does he make and mix the sea when he moves from his place.