Exodus 23:16

and the Feast of Harvest, afterwards known as the Feast of Weeks, or Pentecost, the first-fruits of thy labors, which thou hast sown in the field, the festival of the grain harvest; and the Feast of Ingathering, afterwards known as the Feast of Tabernacles, which is in the end of the year, in the fall of the year, in October, when thou hast gathered in thy labors out of the field, not only the grain, but also the fruits, the three great products being usually mentioned as corn, wine, and oil.