'Olive tree' in the Bible

Yet gleaning grapes shall be left in it, as the shaking of an olive tree, two or three berries in the top of the uppermost bough, four or five in its outmost fruitful branches, says the LORD God of Israel.

When thus it shall be in the midst of the land among the people, there shall be like the shaking of an olive tree, and like the gleaning grapes when the vintage is done.