The Passover and Unleavened Bread
Leviticus 23:4-8 KJV
4‘These are the feasts of the Lord, holy convocations which you shall proclaim at their appointed times.
5On the fourteenth day of the first month at twilight is the Lord’s Passover.
6And on the fifteenth day of the same month is the Feast of Unleavened Bread to the Lord; seven days you must eat unleavened bread.
7On the first day you shall have a holy convocation; you shall do no customary work on it.
8But you shall offer an offering made by fire to the Lord for seven days. The seventh day shall be a holy convocation; you shall do no customary work on it.’ ”