'Gleaning' in the Bible

And when ye reap the harvest of your land, thou shalt not wholly reap the corners of thy field, and the gleaning of thy harvest thou shalt not gather.

And when ye reap the harvest of your land, thou shalt not in thy harvest entirely reap the corners of thy field, and the gleaning of thy harvest shalt thou not gather: thou shalt leave them unto the poor and to the stranger: I am Jehovah your God.

And he said to them, "What have I done now in comparison with you? Is not the gleaning of the grapes of E'phraim better than the vintage of Abi-e'zer?

And a gleaning shall be left in it, as at the shaking of an olive-tree: two, three berries above, in the tree-top; four, five in its fruitful boughs, saith Jehovah, the God of Israel.

If grape-gatherers had come to thee, would they not have left a gleaning? If thieves by night, they would destroy only till they had enough.