Ephesians 4:31-32 Let all bitterness and wrath and anger and clamor and slander be put away from you, along with all malice. Be kind to one another, tenderhearted, forgiving one another, as God in Christ forgave you.
Matthew 7:12 So whatever you wish that others would do to you, do also to them, for this is the Law and the Prophets.
There are so many! Just a couple to go along with other suggestions : As we have therefore opportunity, let us do good unto all men, especially unto them who are of the household of faith. -Galatians 6:10 Be kindly affectioned one to another with brotherly love; in honour preferring one another; -Romans 12:10. If it be possible, as much as lieth in you, live peaceably with all men. -Romans 12:18. Therefore if thine enemy hunger, feed him; if he thirst, give him drink: for in so doing thou shalt heap coals of fire on his head. -Romans 12:20 Matthew 25:34-40