'Harvest' in the Bible
‘Now when you reap the harvest of your land, you shall not reap to the very corners of your field, nor shall you gather the gleanings (grain left after reaping) of your harvest.
“Speak to the children of Israel and say to them, ‘When you enter the land which I am giving you and reap its harvest, you shall bring the sheaf of the first fruits of your harvest to the priest.
‘When you reap the harvest of your land, you shall not reap to the edges of your field, nor gather the gleaning of your harvest; you are to leave them for the poor and for the stranger. I am the Lord your God.’”
Whatever reseeds itself (uncultivated) in your harvest you shall not reap, nor shall you gather the grapes from your uncultivated vine, it shall be a year of sabbatical rest for the land.