Charles H. Spurgeon on Psalms 140:11

Let not an evil speaker be established in the earth. For that would be an established plague, a perpetual curse. Men of false and cruel tongues are of most use when they go to fatten the soil in which they rot as carcases: while they are alive they are the terror of the good, and the torment of the poor. God will not allow the specious orators of falsehood to retain the power they temporarily obtain by their deceitful speaking. They may become prominent, but they cannot become permanent. They shall be disendowed and disestablished in spite of all that they can say to the contrary. All evil bears the element of decay within itself; for what is it but corruption? Hence the utmost powers of oratory are insufficient to settle upon a sure foundation the cause which bears a lie within it. Evil shall hunt the violent man to overthrow him. He hunted the good, and now his own evil shall hunt him. He tried to overthrow the goings of the righteous, and now his own unrighteousness shall prove his overthrow. As he was violent, so shall he be violently assaulted and hunted down. Sin is its own punishment; a violent man will need no direr doom than to reap what he has sown. It is horrible for a huntsman to be devoured by Iris own hounds; yet this is the sure fate of the persecutor.