וַיַּעֲמֹ֤ד מֹשֶׁה֙ בְּשַׁ֣עַר הַֽמַּחֲנֶ֔ה וַיֹּ֕אמֶר מִ֥י לַיהוָ֖ה אֵלָ֑י וַיֵּאָסְפ֥וּ אֵלָ֖יו כָּל־בְּנֵ֥י לֵוִֽי׃
then Moses stood in the gate of the camp, and said: ‘Whoso is on the LORD’S side, let him come unto me.’ And all the sons of Levi gathered themselves together unto him.
Read Jewish philosophical commentary on Exodus 32:26: and classical philosophical sources.