Leviticus 9:1 Halakhah

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;