Leviticus 19:35

31 Do not go after those who make use of spirits, or wonder-workers; do not go in their ways or become unclean through them: I am the Lord your God.

32 Get up from your seats before the white-haired, and give honour to the old, and let the fear of your God be before you: I am the Lord.

33 And if a man from another country is living in your land with you, do not make life hard for him;

34 Let him be to you as one of your countrymen and have love for him as for yourself; for you were living in a strange land, in the land of Egypt: I am the Lord your God.

35 Do not make false decisions in questions of yard-sticks and weights and measures.

36 Have true scales, true weights and measures for all things: I am the Lord your God, who took you out of the land of Egypt;

37 You are to keep all my rules and my decisions and do them: I am the Lord.