Deuteronomy 25:13-16 - Honest Weights And Measures
13 You shall not have in your bag diverse weights, a great and a small. 14 You shall not have in your house diverse measures, a great and a small. 15 You shall have a perfect and just weight. You shall have a perfect and just measure, that your days may be long in the land which Yahweh your God gives you. 16 For all who do such things, [even] all who do unrighteously, are an abomination to Yahweh your God.