Micah 6:10

The Lord asked if there was still anyone in the wicked house of Judah who had treasures that he or she had accumulated through wicked behavior. For example, was there any seller who used a small ephah, one that was less than a true ephah? If so, this was evidence of not acting justly (Micah 6:8; cf. Leviticus 19:35-36; Deuteronomy 25:13-16; Amos 8:5). The ephah was a basket that held about six gallons of dry produce. Using a slightly smaller basket robbed the buyer of some product that he was purchasing for the price of an ephah. The implication of the question is that this practice was common in Jerusalem.