Leviticus 19:32-37

32 Thou shalt rise up before grey hair and honour the face of the elder and fear thy God. I am the LORD.
33 And when a stranger shall sojourn with thee in your land, ye shall not oppress him.
34 But the stranger that dwells with you shall be as the natural of yourselves, and thou shalt love him as thyself; for ye were strangers in the land of Egypt. I AM your God.
35 Ye shall do no unrighteousness in judgment, in measurement of land, in weight, or in other measure.
36 Just balances, just weights, a just ephah, and a just hin shall ye have. I AM your God, who brought you out of the land of Egypt.
37 Keep, therefore, all my statutes and all my rights and do them. I am the LORD.