'Grain' in the Bible

saying,“When will the New Moon [festival] be overSo that we may sell grain,And the Sabbath ended so that we may open the wheat market,Making the ephah [measure] smaller and the shekel bigger [that is, selling less for a higher price]And to cheat by falsifying the scales,

“For behold, I am commanding,And I shall shake and sift the house of Israel among all nations [and cause it to tremble]Like grain is shaken in a sieve [removing the chaff],But not a kernel [of the faithful remnant] shall fall to the ground and be lost [from My sight].