[The Waters Say:]

When His voice resounds with great masses of water in the heavens,

and He raises vapors from the ends of the earth.

(Yirmeyahu 51:16)

Daas Sofrim states that this prayer is related to the emotion aroused by Yisrael by the sight of the many bodies of water which they saw in Babylon.  Water is the symbol of life and of Torah, both give nourishment to creation and spiritual life.

[-MeAm Lo'ez, Perek Shira]