One of the ten Niggunim composed by the Alter Rebbe.
For many generations it has been the custom of the Lubavitcher Rebbe to sing this Niggun at the end of the Pesach Seder, while pouring the wine from the Kos Shel Eliyahu (Elijah's Cup) back into the bottle.
The melody is divided into three short parts, similar to one another each sung progressively louder. It is a heartfelt declaration of thankfulness, spiritual satisfaction, and steadfast belief in the future redemption through the coming of Moshiach.
By the Rebbe