Leviticus 19:17-19 Revised Standard Version (RSV)
17 “You shall not hate your brother in your heart, but you shall reason with your neighbor, lest you bear sin because of him. 18 You shall not take vengeance or bear any grudge against the sons of your own people, but you shall love your neighbor as yourself: I am the Lord.
19 “You shall keep my statutes. You shall not let your cattle breed with a different kind; you shall not sow your field with two kinds of seed; nor shall there come upon you a garment of cloth made of two kinds of stuff.