Exodus 23:11

23:11 But in the seventh year you must let it lie fallow and leave it alone so that the poor of your people may eat, and what they leave any animal in the field may eat; you must do likewise with your vineyard and your olive grove.

Exodus 23:16

23:16 “You are also to observe the Feast of Harvest, the firstfruits of your labors that you have sown in the field, and the Feast of Ingathering at the end of the year when you have gathered in your harvest out of the field.