RABBINICAL JUDAISM TEACH THEY SIT IN THE SEAT OF MOSES

Talmud: Rosh HaShanah 25a

R. Akiba went [to R. Joshua] … He said to him: I can bring proof [from the Scripture] that whatever Rabban Gamaliel has done [rabbinical court decision] is valid … He [R. Joshua] then went to R. Dosa b. Harkinas, who said to him: if we call in question [the decisions of] the Beth din of Rabban Gamaliel, we must call in question the decisions of every Beth din which has existed since the days of Moses up to the present time. For it says, then went up Moses and Aaron, Nadab and Abihu and seventy of the elders of Israel. [Exodus 24:9]