Leviticus 23:5-11

⁵The first month, the fourteenth day of the month at evening, is the phase of the Lord:

⁶And the fifteenth day of the same month is the solemnity of the unleavened bread of the Lord. Seven days shall you eat unleavened bread.

⁷The first day shall be most solemn unto you, and holy: you shall do no servile work therein:

⁸But you shall offer sacrifice in fire to the Lord seven days. And the seventh day shall be more solemn, and more holy: and you shall do no servile work therein.

⁹And the Lord spoke to Moses, saying:

¹⁰Speak to the children of Israel, and thou shalt say to them: When you shall have entered into the land which I will give you, and shall reap your corn, you shall bring sheaves of ears, the firstfruits of your harvest to the priest:

¹¹Who shall lift up the shed before the Lord, the next day after the sabbath, that it may be acceptable for you, and shall sanctify it.