Passover (Heb. pesa 'h, from pasa 'A, to leap over, to pass by; Aram, pas 'ha; Sept. naoxa; Vul. pascha), a Hebrew festival, instituted by Moses in commemoration of the Israelites remaining intact on the night of the destruction of the first born in Egypt, immediately preceding the exodus from that country (Ex. xii.). Originally it was observed by sacrificing pass-over lambs toward the evening of the 14th of the first Hebrew spring month (now Nisan), and eating them on the following night, as well as by excluding all leaven from the meals of that evening and the following seven days, the first and last of which were observed as holy. Since the final destruction of the temple of Jerusalem, the passover has been celebrated by eating unleavened bread during the seven (out of Palestine during eight) days, by abstinence from labor on the first and last (out of Palestine on the first two and last two), and by the observance on the first evening (out of Palestine on the first and second) of various domestic rites commemorative of the deliverance from Egyptian bondage, including the recital of Scriptural and legendary narratives and familiar conversation on the same national event, and the chanting of psalms.