Leviticus 23:3-11

³Six days shalt thou do works, but on the seventh day is the sabbath; a rest, a holy convocation to the Lord: thou shalt not do any work, it is a sabbath to the Lord in all your dwellings.

⁴These are the feasts to the Lord, holy convocations, which ye shall call in their seasons.

⁵In the first month, on the fourteenth day of the month, between the evening times is the Lord's passover.

⁶And on the fifteenth day of this month is the feast of unleavened bread to the Lord; seven days shall ye eat unleavened bread.

⁷And the first day shall be a holy convocation to you: ye shall do no servile work.

⁸And ye shall offer whole-burnt-offerings to the Lord seven days; and the seventh day shall be a holy convocation to you: ye shall do no servile work.

⁹And the Lord spoke to Moses, saying,

¹⁰Speak to the children of Israel, and thou shalt say to them, When ye shall enter into the land which I give you, and reap the harvest of it, then shall ye bring a sheaf, the first-fruits of your harvest, to the priest;

¹¹and he shall lift up the sheaf before the Lord, to be accepted for you. On the morrow of the first day the priest shall lift it up.