תהלים, פרק ק״ד, פסוק י׳

After gathering the waters of the sea, God intentionally left fresh water upon the dry land, carefully organizing the natural world for the benefit of all living things. This process begins with a cycle where vapor rises from the ocean and falls as rain upon the mountains. The earth absorbs and filters this moisture, eventually releasing it outward as flowing springs [אבן עזרא, מלבי״ם]. God directs these springs to run continuously through valleys and riverbeds, ensuring a steady, unending supply of water [מצודת דוד, מאירי, ביאור שטיינזלץ].

Rather than spreading out randomly, these streams are specifically guided to travel through narrow paths between the mountains [מלבי״ם]. This precise routing serves two main purposes. First, it protects the plant life growing in the wider valleys from being flooded and destroyed. Second, it reflects God's direct care for all of His creations. Instead of flowing only toward human settlements, the water is sent into remote, rugged areas where wild animals live, providing necessary hydration for desert travelers and beasts of the field alike [רד״ק, אלשיך].

The constant movement of this fresh water is absolutely essential for the survival of the world. It provides drinking water for all creatures, nourishes the trees, cools the air, and maintains moisture within the physical body. Beyond these natural benefits, it also serves practical human needs, such as powering flour mills [רד״ק].