וַיַּ֥עַל מֹשֶׁ֖ה וְאַהֲרֹ֑ן נָדָב֙ וַאֲבִיה֔וּא וְשִׁבְעִ֖ים מִזִּקְנֵ֥י יִשְׂרָאֵֽל׃
Then went up Moses, and Aaron, Nadab, and Abihu, and seventy of the elders of Israel;
Read kabbalistic (mystical) interpretation of Exodus 24:9: and classical mystical sources.