Leviticus 10:36

Just balances, for measures of weight, just weights, stones used as standards of weight, a just ephah, as a standard for dry measure, and a just hin, as the standard for liquid measure, shall ye have. I am the Lord, your God, which brought you out of the land of Egypt. It is clear that equity in the affairs of daily life is here made to rest upon the foundation of duty toward God.