Exodus 34:22 New King James Version (NKJV)

²² “And you shall observe the Feast of Weeks, of the firstfruits of wheat harvest, and the Feast of Ingathering at the year’s end.

Leviticus 23:10 New King James Version (NKJV)

¹⁰ “Speak to the children of Israel, and say to them: ‘When you come into the land which I give to you, and reap its harvest, then you shall bring a sheaf of the firstfruits of your harvest to the priest.

Numbers 28:26 New King James Version (NKJV)

Offerings at the Feast of Weeks

²⁶ ‘Also on the day of the firstfruits, when you bring a new grain offering to the Lord at your Feast of Weeks, you shall have a holy convocation. You shall do no customary work.