Números 16:25

ויקם משה AND MOSES ROSE UP [AND WENT UNTO DATHAN AND ABIRAM] — He still believed that they would show respect to him (defer to him if he personally appealed to them), but they did not do so, (and therefore he then addressed himself to all the congregation — cf. next verse) (Midrash Tanchuma, Korach 8).

וַיָּ֣קׇם מֹשֶׁ֔ה וַיֵּ֖לֶךְ אֶל־דָּתָ֣ן וַאֲבִירָ֑ם וַיֵּלְכ֥וּ אַחֲרָ֖יו זִקְנֵ֥י יִשְׂרָאֵֽל׃

And Moshe rose up and went to Datan and Aviram; and the elders of Yisra᾽el followed him.