'Olive tree' in the Bible

Yet gleaning grapes shall be left in it, as the shaking of an olive tree, two or three ripe olives in the top of the uppermost branch, four or five in the fruit-tree branches of it, says Jehovah, the God of Hosts.

For so it is in the midst of the land among the people, it shall be like the shaking of an olive tree and as gleanings when the grape harvest is completed.