Leviticus 23:5-9

⁵In the first month, on the fourteenth day of the month at nightfall, is the Lord's Passover;

⁶And on the fifteenth day of the same month is the feast of unleavened bread; for seven days let your food be unleavened bread.

⁷On the first day you will have a holy meeting; you may do no sort of field-work.

⁸And every day for seven days you will give a burned offering to the Lord; and on the seventh day there will be a holy meeting; you may do no field-work.

⁹And the Lord said to Moses,