Leviticus 23:4-8

4There are other special days. They are holy feasts. On these days you must tell the people how to obey the Lord's rules.

5One special day is the 14th day of the first month. When the sun goes down, the Passover to the Lord begins.

6The 15th day of the first month, the Feast of Flat Bread begins. It is a feast to the Lord. For seven days the people must eat bread that has no yeast in it.

7On the first day the people must meet together and they must not work.

8For seven days the people must give burnt offerings to the Lord. On the seventh day they must stop work and they must worship the Lord.’