וִֽידַעְתֶּ֕ם כִּ֚י שִׁלַּ֣חְתִּי אֲלֵיכֶ֔ם אֵ֖ת הַמִּצְוָ֣ה הַזֹּ֑את לִֽהְי֤וֹת בְּרִיתִי֙ אֶת־לֵוִ֔י אָמַ֖ר יְהוָ֥ה צְבָאֽוֹת׃
Know then that I have sent This commandment unto you, That My covenant might be with Levi, Saith the LORD of hosts.
Pirkei Avot
Hillel and Shammai received [the oral tradition] from them. Hillel used to say: be of the disciples of Aaron, loving peace and pursuing peace, loving mankind and drawing them close to the Torah.