'Gleanings' in the Bible

Yet gleanings will be left in it like the shaking of an olive tree,Two or three olives on the topmost bough,Four or five on the branches of a fruitful tree,Declares the Lord, the God of Israel.

For thus it will be in the midst of the earth among the peoples,As the shaking of an olive tree,As the gleanings when the grape harvest is over.