Ecclesiastes 1:7 KJV
All the rivers run into the sea; yet the sea is not full; unto the place from whence the rivers come, thither they return again.
Ecclesiastes 1:7, King James Version
In context
6 The wind goeth toward the south, and turneth about unto the north; it whirleth about continually, and the wind returneth again according to his circuits.
7 All the rivers run into the sea; yet the sea is not full; unto the place from whence the rivers come, thither they return again.
8 All things are full of labour; man cannot utter it: the eye is not satisfied with seeing, nor the ear filled with hearing.