At thy rebuke they fled - At thy command; or when thou didst speak to them. The Hebrew word also implies the notion of "rebuke," or "reproof," as if there were some displeasure or dissatisfaction. Proverbs 13:1; Proverbs 17:10; Ecclesiastes 7:5; Isaiah 30:17; Psalm 76:6. It is "as if" God had been displeased that the waters prevented the appearing or the rising of the dry land, and had commanded them to "hasten" to their beds and channels, and no longer to cover the earth. The allusion is to Genesis 1:9, and there is nowhere to be found a more sublime expression than this. Even the command, "And God said, Let there be light; and there was light," so much commended by Longinus as an instance of sublimity, does not surpass this in grandeur.
At the voice of thy thunder they hasted away - They fled in dismay. The Hebrew word - חפז châphaz - contains the idea of haste, trepidation, consternation, alarm, "as if" they were frightened; Psalm 31:22. God spake in tones of thunder, and they fled. It is impossible to conceive anything more sublime than this.

At thy rebuke they fled - When God separated the waters which were above the firmament from those below, and caused the dry land to appear. He commanded the separation to take place; and the waters, as if instinct with life, hastened to obey.
At the voice of thy thunder - It is very likely God employed the electric fluid as an agent in this separation.

At thy rebuke they fled,.... The depths of water that covered the earth fled, went off apace, when Christ, the essential Word, gave the word of command that they should; saying, "Let the waters under the heaven be gathered together unto one place, and let the dry land appear, and it was so", Genesis 1:9 and this being called a "rebuke", suggests as if there was something amiss, irregular and disorderly, and to be amended; as if these waters were not in their proper place.
At the voice of thy thunder they hasted away; ran off with great precipitancy; just as a servant, when his master puts on a stern countenance, and speaks to him in a thundering, menacing manner, hastes away from him to do his will and work. This is an instance of the mighty power of Christ; and by the same power he removed the waters of the deluge; when they covered the earth, and the tops of the highest hills; and rebuked the Red sea, and it became dry land; and drove back the waters of Jordan for the Israelites to pass through; and who also rebuked the sea of Galilee when his disciples were in distress: and with equal ease can he and does he remove the depth of sin and darkness from his people at conversion; rebukes Satan, and delivers out of his temptations, when he comes in like a flood; and rebukes the waters of affliction when they threaten to overwhelm; who are his servants, and come when he bids them come, and go when he bids them go.

Rebuke - Upon thy command, Genesis 1:9. Fled - They immediately went to the place which God had allotted them.