LEV40 Provide testimony needed by Jewish courts of law. Whenever we possess information relevant to a Jewish court of law, we must come forth and reveal the information to the judges. [Regarding litigation over money matters, we are not obligated to come forth unless the court or one of the litigants demands our testimony. When a life is at stake, however, such as when someone witnesses a murder, the witness must come forth on his own and testify.] So, too, if he sees his fellow Jew violating any Torah prohibition, he must come forth and testify, to uproot the evil and prevent people from violating the Torah in the future. Key concept is obvious. The great benefit is clear; so no explanation is needed (See [[EXOD449]] Exodus 20:13 false CHINUCH 28-9).