"And your eye shall not have pity"—Deuteronomy 19:21.
A judge may not have pity and show leniency on one who murdered or maimed another. He may not say, "This poor person unintentionally amputated his fellow's arm, or knocked out his eye," and then show leniency with regard to the requisite restitution. [And similarly with regard to showing mercy in a capital case.]
