The Council of Chalcedon

If any Clergyman have a matter against another clergyman, he shall not forsake his bishop and run to secular courts; but let him first lay open the matter before his own Bishop, or let the matter be submitted to any person whom each of the parties may, with the Bishop's consent, select. And if any one shall contravene these decrees, let him be subjected to canonical penalties. And if a clergyman have a complaint against his own or any other bishop, let it be decided by the synod of the province. And if a bishop or clergyman should have a difference with the metropolitan of the province, let him have recourse to the Exarch of the Diocese, or to the throne of the Imperial City of Constantinople, and there let it be tried.