Deuteronomy 25:13-15

13“You ashall not have in your bag two kinds of weights, a large and a small. 14You shall not have in your house two kinds of measures, a large and a small. 15A full and fair
Or just, or righteous; twice in this verse
weight you shall have, a full and fair measure you shall have, cthat your days may be long in the land that the Lord your God is giving you.
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