Truth is generally the best vindication against slander.
Slander Quotes
The truth is no slander.
Never throw mud. You may miss your mark, but you will have dirty hands.
Slander cannot destroy an honest man – when the flood recedes the rock is there.
To vilify a great man is the readiest way in which a little man can himself attain greatness.
He who blackens others does not whiten himself.
A tongue prone to slander is the proof of a depraved mind.