The mountains saw Thee and they trembled - literally, “they tremble.” While man is insensate, inanimate nature feels and attests the presence of its Maker. “It saw it trembles.” To see, feel, tremble were one. The prophet does not follow a bare order of events, or bind himself to miracles which actually took place. The mountains tremble with earthquakes, or seem to be shaken by the thunders which they re-echo. And so they are signs, how what is firmest and closes up the way to man, trembles at the Presence of God. Whatever is lifted up shall be bowed down before Him. (See Zechariah 4:7.). But the word “trembled” is that which is especially used of travail pangs and so it may spiritually denote that “they who conceive the fear of God shall bring forth unto salvation.” “The overflowing,” i. e., the impetuous, sweeping, flow, of the water (or, of waters), such as in themselves would bear all before them, pass by harmless. The more they swell, the more they expend themselves, and pass away. “The whole force of persecution, wherewith they vexed Thy people, at sight of Thee passed away,” like a torrent which rages and disappears, and, by raging, the sooner wastes itself.
The deep uttered his voice, and lifted up his hands - רום = מרום mârôm which stands as the accusative of direction with “lifted up the eyes” Isaiah 37:23; Isaiah 40:26.
On high - The noise of the waves, when God brought the strong East wind over it and Psalms 106:9. rebuked it, was as a cry to God; the waves, as they swelled, were like hands lifted up to Him, and stricken one against the other. There is no distinct ground against a slightly different rendering it: “the deep uttered his voice, the height lifted up his hands” i. e., to One yet higher, whom height and depth owned as their Lord and worshipped.