Psalms 104:7

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 - 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.

104:7 Rebuke - Upon thy command, Gen 1:9. Fled - They immediately went to the place which God had allotted them.