Cross reference
Jeremiah 49:9
9 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?
Obadiah 1:5-6
5 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?
6 How Esau will be ransacked! How his hidden treasures are sought out!
Isaiah 17:6
6 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, says Yahweh, the God of Israel.