Leviticus 23:3-11

³You may work for six days, but the seventh day is a Sabbath of complete rest, a holy assembly. You must do no work because it is a Sabbath for Yahweh in all the places where you live.

⁴These are the appointed festivals of Yahweh, the holy assemblies that you must announce at their appointed times:

⁵In the first month, on the fourteenth day of the month at twilight, is Yahweh's Passover.

⁶On the fifteenth day of the same month is the Festival of Unleavened Bread for Yahweh. For seven days you must eat unleavened bread.

⁷The first day you must set apart to gather together; you will not do any of your regular work.

⁸You will present a food offering to Yahweh for seven days. The seventh day is an assembly set apart to Yahweh, and on that day you must not do any regular work.'”

⁹Yahweh spoke to Moses, saying,

¹⁰“Speak to the people of Israel and say to them, 'When you have come into the land that I will give you, and when you reap its harvest, then you must bring a bundle of the firstfruit of the grain to the priest.

¹¹He will raise the bundle of grain before Yahweh and present it to him, for it to be accepted on your behalf. It is on the day after the Sabbath that the priest will raise it and present it to me.