A line from the weekday prayer Ezrat Avoteinu and the Shabbat prayer Nishmat. The melody, in two parts, celebrates the Exodus from Egypt and is sung with great joy and enthusiasm, particularly during the Passover holidays. It also voices hope for the future liberation. Originally the melody was a favorite of the famous Chassid Rabbi Hillel Paritcher, a Chassid of the Tzemach Tzedek, the third Chabad Rebbe. Brought to the fifth Lubavitcher Rebbe for Pesach 5660 (1900) by the Chassidim of Nikolayev, Ukraine, the melody is currently a great favorite.