Leviticus 23:11

8 But 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.

9 And the Lord spoke to Moses, saying:

10 Speak 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.

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

12 And on the same day that the sheaf is consecrated, a lamb without blemish of the first year shall be killed for a holocaust of the Lord.

13 And the libations shall be offered with it: two tenths of flour tempered with oil, for a burnt offering of the Lord, and a most sweet odour. Libations also of wine, the fourth part of a hin.

14 You shall not eat either bread, or parched corn, or frumenty or the harvest, until the day that you shall offer thereof to your God. It is a precept for ever throughout your generations, and all your dwellings.