Shortly after giving the Ten Commandments, God gave Israel another command: “Three times you shall keep a feast to Me in the year: You shall keep the Feast of Unleavened Bread … and the Feast of Harvest, the firstfruits of your labours which you have sown in the field; and the Feast of Ingathering at the end of the year …” (Exodus 23:14-16Exodus 23:14-16 Three times you shall keep a feast to me in the year.
 You shall keep the feast of unleavened bread: (you shall eat unleavened bread seven days, as I commanded you, in the time appointed of the month Abib; for in it you came out from Egypt: and none shall appear before me empty:)
 And the feast of harvest, the first fruits of your labors, which you have sown in the field: and the feast of ingathering, which is in the end of the year, when you have gathered in your labors out of the field.
American King James Version×).
At this Feast of Harvest, also called the Feast of Firstfruits or Weeks, the Israelites were to offer the firstfruits of the late spring wheat harvest in the Holy Land (Numbers 28:26Numbers 28:26Also in the day of the first fruits, when you bring a new meat offering to the LORD, after your weeks be out, you shall have an holy convocation; you shall do no servile work: American King James Version×; Exodus 34:22Exodus 34:22And you shall observe the feast of weeks, of the first fruits of wheat harvest, and the feast of ingathering at the year’s end. American King James Version×). Months later they celebrated another festival, called the Feast of Ingathering or the Feast of Tabernacles. This came at “the end of the year”—the end of the agricultural cycle of the year at summer’s end in the Holy Land—when the people gathered in all the harvest.