Leviticus 23:4-8

4“These are the appointed feasts of Adonai, holy convocations which you are to proclaim in their appointed season.

5During the first month, on the fourteenth day of the month in the evening, is Adonai’s Passover.

6On the fifteenth day of the same month is the Feast of Matzot to Adonai. For seven days you are to eat matzah .

7On the first day you are to have a holy convocation and you shall do no regular work.

8Instead you are to present an offering made by fire to Adonai for seven days. On the seventh day is a holy convocation, when you are to do no regular work.”