Bible Verses About Slander: Forbidden

Thou shalt not raise a false report: put not thine hand with the wicked to be an unrighteous witness.

Let all bitterness, and wrath, and anger, and clamour, and evil speaking, be put away from you, with all malice:

Speak not evil one of another, brethren. He that speaketh evil of his brother, and judgeth his brother, speaketh evil of the law, and judgeth the law: but if thou judge the law, thou art not a doer of the law, but a judge.