The feast of unleavened bread. This commenced with the Passover, and continued for the seven days following, with a "holy convocation" on the first of the seven and on the last (Leviticus 23:5-8). Unleavened bread was eaten in commemoration of the hasty exodus from Egypt (Exodus 12:34).
A sheaf of new barley—the first-fruits of the harvest—was offered as a wave-offering before the Lord (Leviticus 23:10-14). Every male Israelite of full age was bound to attend, and to bring with him a free-will offering.
In the time appointed of the month—i.e; on the fourteenth day (Exodus 12:18). None shall appear before me empty. This rule applies, not to the Passover only, but to all the feasts.