Passover, the chief festival of the Jews in commemoration of the passing of the destroying angel over the houses of the Israelites on the night when he slew the first-born of the Egyptians; it was celebrated in April, lasted eight days, only unleavened bread was used in its observance, and a lamb roasted whole was eaten with bitter herbs, the partakers standing and road-ready as on their departure from the land of bondage.
Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)
Passionists * Passow, Franz