'Olive tree' in the Bible

Yet there shall be left therein gleanings, as the shaking of an olive-tree, two or three berries in the top of the uppermost bough, four or five in the outmost branches of a fruitful tree, saith Jehovah, the God of Israel.

For thus shall it be in the midst of the earth among the peoples, as the shaking of an olive-tree, as the gleanings when the vintage is done.