Rabbi is not an occupation found in the Torah (i.e. the Pentateuch) as such, and ancient generations did not employ related titles such as Rabban, Ribbi, or Rab to describe either the Babylonian sages or the sages in Israel. Even the very eminent Biblical prophets are referred to as “Haggai the prophet” e.g. The titles “Rabban” and “Rabbi” are first mentioned in Hebrew scriptures in the Mishnah (c. 200 CE). The term was first used for Rabban Gamaliel the elder, Rabban Simeon his son, and Rabban Johanan ben Zakkai, all of whom were patriarchs or presidents of the Sanhedrin.