Leviticus 23:9

5 The Passover to the LORD begins at twilight on the fourteenth day of the first month.

6 On the fifteenth day of the same month begins the Feast of Unleavened Bread to the LORD. For seven days you must eat unleavened bread.

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.

Read all of Leviticus 23