Charles H. Spurgeon on Psalms 58:2

Yea, in heart ye work wickedness. Down deep in your very souls ye hold a rehearsal of the injustice ye intend to practise, and when your opportunity arrives, ye wreak vengeance with a gusto; your hearts are in your wicked work, and your hands are therefore ready enough. Those very men who sat as judges, and pretended to so much indignation at the faults imputed to their victim, were in their hearts perpetrating all manner of evil. Ye weigh the violence of your hands in the earth. They were deliberate sinners, cold, calculating villains. As righteous judges ponder the law, balance the evidence, and weigh the case, so the malicious dispense injustice with malice aforethought in cold blood. Note in this verse that the men described sinned with heart and hand; privately in their heart, publicly in the earth; they worked and they weighed —they were active, and yet deliberate. See what a generation saints have to deal with! Such were the foes of our Lord, a generation of vipers, an evil and adulterous generation; they sought to kill him because he was righteousness itself, yet they masked their hatred to his goodness by charging him with sin.