Matthew 7:12
Everything, therefore, be it what it may, that you would have men do to you, do you also the same to them; for in this the Law and the Prophets are summed up.
Romans 1:30
They were secret backbiters, open slanderers; hateful to God, insolent, haughty, boastful; inventors of new forms of sin, disobedient to parents, destitute of common sense,
Romans 12:17
Pay back to no man evil for evil. Take thought for what is right and seemly in every one's esteem.
Romans 13:10
Love avoids doing any wrong to one's fellow man, and is therefore complete obedience to Law.
Titus 3:2
not speak evil of any one, nor be contentious, but yield unselfishly to others and constantly manifest a forgiving spirit towards all men.
James 4:11
Do not speak evil of one another, brethren. The man who speaks evil of a brother-man or judges his brother-man speaks evil of the Law and judges the Law. But if you judge the Law, you are no longer one who obeys the Law, but one who judges it.
1 Peter 2:1-2
Rid yourselves therefore of all ill-will and all deceitfulness, of insincerity and envy, and of all evil speaking.
3 John 1:11
My dear friend, do not follow wrong examples, but right ones. He who habitually does what is right is a child of God: he who habitually does what is wrong has not seen God.