'Gleaning' in the Bible

But he said to them, “What have I done now [that is so significant] in comparison with you? Is not the gleaning (leftovers) of the grapes of [your tribe of] Ephraim better than the vintage (entire harvest) of [my clan of] Abiezer?

So she stayed close to the maids of Boaz, gleaning until the end of the barley and wheat harvests. And she lived with her mother-in-law.

For so it will be in the midst of the earth among the peoples,As the shaking of an olive tree,As the gleanings when the grape harvest is over [and only a little of the fruit remains].

“If thieves came to you,If robbers by night—How you will be ruined!—Would they not steal only until they had enough?If grape gatherers came to you,Would they not leave some grapes for gleaning?