Deuteronomy 25:13-16

MSB(i) 13 You shall not have two differing weights in your bag, one heavy and one light. 14 You shall not have two differing measures in your house, one large and one small. 15 You must maintain accurate and honest weights and measures, so that you may live long in the land that the LORD your God is giving you. 16 For everyone who behaves dishonestly in regard to these things is detestable to the LORD your God.