Leviticus 19:36
34 The resident foreigner who lives with you must be to you as a native citizen among you; so you must love the foreigner as yourself, because you were foreigners in the land of Egypt. I am the Lord your God. 35 You must not do injustice in the regulation of measures, whether of length, weight, or volume. 36 You must have honest balances, honest weights, an honest ephah, and an honest hin. I am the Lord your God who brought you out from the land of Egypt. 37 You must be sure to obey all my statutes and regulations. I am the Lord.’”
Proverbs 16:11
9 A person plans his course, but the Lord directs his steps. 10 The divine verdict is in the words of the king; his pronouncements must not act treacherously against justice. 11 Honest scales and balances are from the Lord; all the weights in the bag are his handiwork. 12 Doing wickedness is an abomination to kings, because a throne is established in righteousness. 13 The delight of a king is righteous counsel, and he will love the one who speaks uprightly.
Notes and References
"... As highlighted in the Old Testament, it was of paramount importance to implement the standard of conduct that would allow the Hebrew people to become established as a civil society. When institutionalizing the grievance mechanism for the Israelites, Moses was instructed by his father-in-law to select trustworthy men who hated dishonest gain to serve as judges to settle disputes among the people (Exodus 18:21). Furthermore, specific references to integrity in business dealings are mentioned in several passages. In Leviticus 19:36, “Do not use dishonest standards when measuring length, weight or quantity. Use honest scales and honest weights…” In Deuteronomy 25:15-16, “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. For the Lord your God detests anyone who does these things, anyone who deals dishonestly.” In Proverbs 16:11, “Honest scales and balances belong to the Lord” ..."
Crain, Susan J. Do Unto Others — A Three-Dimensional Theology of Finance (pp. 42-53) Journal of Biblical Integration in Business, Vol. 20, No. 2, 2017