Ecclesiastes 1:7
New International Version (NIV1984)
7 .....All streams flow into the sea,
............yet the sea is never full.
.......To the place the streams come from,
............there they return again.
From BibleGateway.com: http://www.biblegateway.com/passage/?search=Ecclesiastes 1:7&version=NIV1984
NIV®