Codex Hammurabi

Wikisource has the Codex Hammurabi! This is the oldest written law known to mankind. As such it holds precedence over all that follows it. I especially like this one:

5. If a judge try a case, reach a decision, and present his judgment in writing; if later error shall appear in his decision, and it be through his own fault, then he shall pay twelve times the fine set by him in the case, and he shall be publicly removed from the judge's bench, and never again shall he sit there to render judgment.