Deuteronomy 25:13-16 NIV

[13] Do not have two differing weights in your bag—one heavy, one light. [14] Do not have two differing measures in your house—one large, one small. [15] You must have accurate and honest weights and measures, so that you may live long in the land the LORD your God is giving you. [16] For the LORD your God detests anyone who does these things, anyone who deals dishonestly.