Leviticus 23:7

‘Now on the first day there shall be a holy convocation, and on the seventh day there shall be a holy convocation for you; no work at all shall be done on them, except what must be eaten by every person, that alone may be done by you.

‘In the first month, on the fourteenth day of the month at evening, you shall eat unleavened bread until the twenty-first day of the month at evening.

“You shall keep the Feast of Unleavened Bread; for seven days you are to eat unleavened bread, as I commanded you, at the appointed time in the month Abib, for in it you came out of Egypt. And none shall appear before Me empty-handed.

‘On this same day you shall make a proclamation as well; it shall be a holy convocation for you. You shall do no laborious work. It is to be a perpetual statute in all your places of habitation throughout your generations.

then make an offering by fire to Yahweh, a burnt offering or a sacrifice to fulfill a special vow, or as a freewill offering or in your appointed times, to make a soothing aroma to Yahweh, from the herd or from the flock.

‘Then on the fourteenth day of the first month shall be the Passover of Yahweh.

‘On the first day shall be a holy convocation; you shall do no laborious work.

“And it shall be the prince’s part to provide the burnt offerings, the grain offerings, and the drink offerings, at the feasts, on the new moons, and on the sabbaths, at all the appointed times of the house of Israel; he shall provide the sin offering, the grain offering, the burnt offering, and the peace offerings, to make atonement for the house of Israel.”

“In the first month, on the fourteenth day of the month, you shall have the Passover, a feast of seven days; unleavened bread shall be eaten.