N.Y. Jud. Law § 19

§ 19. Judge must not be interested in costs. A judge shall not,\ndirectly or indirectly, be interested in the costs of an action, claim,\nmatter, motion or proceeding, brought before him, or in a court of which\nhe is, or is entitled to act as a member, except an action, claim,\nmatter, motion or proceeding to which he is a party, or in which he is\ninterested.\n