Leviticus 23:11

7 On the first day you are to hold a sacred assembly; you are not to do any regular work.

8 For seven days you are to present an offering made by fire to the LORD. On the seventh day there shall be a sacred assembly; you must not do any regular work.’”

9 And the LORD said to Moses,

10 “Speak to the Israelites and say, ‘When you enter the land that I am giving you and you reap its harvest, you are to bring to the priest a sheaf of the firstfruits of your harvest.

11 And he shall wave the sheaf before the LORD so that it may be accepted on your behalf; the priest is to wave it on the day after the Sabbath.

12 On the day you wave the sheaf, you shall offer a year-old lamb without blemish as a burnt offering to the LORD,

13 along with its grain offering of two-tenths of an ephah of fine flour mixed with oil—an offering made by fire to the LORD, a pleasing aroma—and its drink offering of a quarter hin of wine.

14 You must not eat any bread or roasted or new grain until the very day you have brought this offering to your God. This is to be a permanent statute for the generations to come, wherever you live.

15 From the day after the Sabbath, the day you brought the sheaf of the wave offering, you are to count off seven full weeks.

Read all of Leviticus 23