Leviticus 23:3-8

3“ ‘There are six days when you may work, but the seventh day is a day of sabbath rest, a day of sacred assembly. You are not to do any work; wherever you live, it is a sabbath to the Lord.

4“ ‘These are the Lord’s appointed festivals, the sacred assemblies you are to proclaim at their appointed times:

5The Lord’s Passover begins at twilight on the fourteenth day of the first month.

6On the fifteenth day of that month the Lord’s Festival of Unleavened Bread begins; for seven days you must eat bread made without yeast.

7On the first day hold a sacred assembly and do no regular work.

8For seven days present a food offering to the Lord. And on the seventh day hold a sacred assembly and do no regular work.’ ”