Targum Jonathan on Leviticus
On the eighth day of the anointing of Aharon and his sons, and the eighth day of that consecration, being the first day of the month of Nisan, when Mosheh had erected the tabernacle, he took it not down, neither ministered any longer at the altar; but Mosheh called Aharon and his sons, and the elders of the sanhedrin of Israel.