'Olive tree' in the Bible

Yet there shall be gleanings 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 the outmost branches of a fruitful tree, says LORD, 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.