The Haggadah is a prayer and guide book for the Passover Seder. The word Haggadah comes from a verse in Torah which states, "On that day you are to VeHaggadeta(tell) your son, it is because of what Adonai did for me when I left Egypt.(Exodus 13:8) The Haggadah is a traditional book for the Jewish Passover celebration.