13You shall not defraud your neighbor; you shall not steal; and you shall not keep for yourself the wages of a laborer until morning. 14You shall not revile the deaf or put a stumbling block before the blind; you shall fear your God: I am the Lord. 15You shall not render an unjust judgment; you shall not be partial to the poor or defer to the great: with justice you shall judge your neighbor. 16You shall not go around as a slanderer among your people, and you shall not profit by the blood of your neighbor: I am the Lord. 17You shall not hate in your heart anyone of your kin; you shall reprove your neighbor, or you will incur guilt yourself. 18You shall not take vengeance or bear a grudge against any of your people, but you shall love your neighbor as yourself: I am the Lord. (Leviticus 19:13-18, NRSV)
This whole passage can be summed up in the title, Love your neighbor. Treat the people around you as you would want to be treated.
If you wouldn’t want someone to do it to you, then don’t do it to someone else.
Love God, Love neighbor.