Leviticus 19:35-37

Ye shall do no unrighteousness in judgment, in measures of length, of weight, or of quantity. Just balances, just weights, a just ephah, and a just hin, shall ye have: I am Jehovah your God, who brought you out of the land of Egypt. And ye shall observe all my statutes, and all mine ordinances, and do them: I am Jehovah.