Vayelech: Chapter 9
The song of the well

We learn that song draws blessings from above downward until they are available in all the worlds, and that the children of Yisrael are destined to proclaim the song both from below upward and from above downward. In this way they will connect a bond of Faith and Trust. And at the time of redemption they will say the entire perfect song that is composed of and includes all other songs, and God will be proclaimed the only God.