'Gleaning' in the Bible

He said to them, "What have I now done in comparison with you? Isn't the gleaning of the grapes of Ephraim better than the vintage of Abiezer?

If grape gatherers came to you, would they not leave some gleaning grapes? if thieves by night, wouldn't they destroy until they had enough?

"If thieves came to you, if robbers by night -- oh, what disaster awaits you -- wouldn't they only steal until they had enough? If grape pickers came to you, wouldn't they leave some gleaning grapes?