Which stilleth the noise of the seas - He calms the seas when they have been agitated by the storm. He causes the mighty waves to settle down, and the whole surface of the ocean becomes calm and smooth. The storm subsides at his command, and the sea is still. It was the manifestation of this power which demonstrated so clearly the divinity of the Lord Jesus, when he said to the troubled waves, “Peace, be still, and the wind ceased, and there was a great calm.” Mark 4:39. Compare Psalms 107:29.
The noise of their waves - The loud roar of the waters, so that they are still.
And the tumult of the people - The raging; the fury; the excitement of assembled multitudes, resembling the raging waves of the ocean. This comparison is very common. See Isaiah 17:12-13. Compare the notes at Revelation 19:6. This is perhaps a more striking and wonderful exhibition of the power of God than that of calming down the waves of the ocean. In the one case, it is the exertion of mere power on nature, acting through its established laws, and where there is no resistance of will; in the other, it is power exerted over the will; power over agents conscious that they are free, and where the worst passions meet and mingle and rage.