'Gleaning' in the Bible

‘When you reap the harvest of your land, moreover, you shall not reap to the very corners of your field nor gather the gleaning of your harvest; you are to leave them for the needy and the alien. I am the Lord your God.’”

But he said to them, “What have I done now in comparison with you? Is not the gleaning of the grapes of Ephraim better than the vintage of Abiezer?

It will be even like the reaper gathering the standing grain,As his arm harvests the ears,Or it will be like one gleaning ears of grainIn the valley of Rephaim.