“ One from the second (row) comes to the first, and one from the third (row) comes to the second, and they choose for them one more (student) from the community who is seated in the third (row) . He didn't sit in the place of the first (student) , but rather he sits in the place seen for him.
Explanation This mishnah presents the physical description of the students in the Sanhedrin who replace judges as necessary. These students sit in three rows, and each time a judge is picked, that judge comes from the first row, and every student moves up one space in the hierarchy. ”