וַיְהִי֙ בַּיּ֣וֹם הַשְּׁמִינִ֔י קָרָ֣א מֹשֶׁ֔ה לְאַהֲרֹ֖ן וּלְבָנָ֑יו וּלְזִקְנֵ֖י יִשְׂרָאֵֽל׃
And it came to pass on the eighth day, that Moses called Aaron and his sons, and the elders of Israel;
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.