The Oral Talmud with Benay Lappe and Dan Libenson Episode 185

The Sages taught in a baraita: Cases of monetary law are adjudicated by three judges.

But if one was a judge accepted as an expert for the public, then he may judge cases even as the lone judge. Rav Naḥman said: One such as I may judge cases of monetary law as the lone judge. And similarly, Rabbi Ḥiyya said: One such as I may judge cases of monetary law as the lone judge. A dilemma was raised before the Sages: What is meant by "Such as I"? That I am gamirna [learned] and savirna [have developed moral intuition], and have received permission.