Exodus 23:16 "Also you shall observe the Feast of the Harvest of the first fruits of your labors from what you sow in the field; also the Feast of the Ingathering at the end of the year when you gather in the fruit of your labors from the field.

Exodus 34:22 "You shall celebrate the Feast of Weeks, that is, the first fruits of the wheat harvest, and the Feast of Ingathering at the turn of the year.

Leviticus 23:15 'You shall also count for yourselves from the day after the sabbath, from the day when you brought in the sheaf of the wave offering; there shall be seven complete sabbaths.

Numbers 28:26 Also on the day of the first fruits, when you present a new grain offering to the LORD in your Feast of Weeks, you shall have a holy convocation; you shall do no laborious work. (NASB ©1995)