AMO 8:5

5 You habitually say, “We wish that [RHQ] the new moon [festival] would end soon, in order that [restrictions on doing business during the festival will be ended] and we can sell grain. We wish that the Sabbath would end soon, in order that we will again be permitted to sell our wheat”— and [when you sell it], you charge a big price for it, and you cheat people by using scales that do not weigh correctly.