The waters — Above in the clouds, which are called waters, Genesis 1:7; Psalms 18:11. The Divine power displays itself in those high places, which are far above the reach of all earthly potentates. Many — Upon the clouds, in which there are vast treasures of water, and upon which God is said to sit or ride, Psalms 18:10-11, Psalms 104:3.
Related Commentaries of Psalms 29:3
Psalms 29:3
3 The voice of the LORD is upon the waters: the God of glory thundereth: the LORD is upon manyc waters.