Amos 8:5-6

saying, “When will the New Moon [festival] be over So 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, So that we may buy the poor [as slaves] for silver [since they are unable to support themselves] And the needy for a pair of sandals, And that we may sell the leftovers of the wheat [as if it were a good grade of grain]?”