וִֽידַעְתֶּ֕ם כִּ֚י שִׁלַּ֣חְתִּי אֲלֵיכֶ֔ם אֵ֖ת הַמִּצְוָ֣ה הַזֹּ֑את לִֽהְי֤וֹת בְּרִיתִי֙ אֶת־לֵוִ֔י אָמַ֖ר יְהוָ֥ה צְבָאֽוֹת׃
Então sabereis que eu vos enviei este mandamento, para que o meu pacto fosse com Levi, diz o SENHOR dos exércitos.
Rashi on Malachi
that My covenant be with Levi for I wish that you will exist with Me with the covenant that I formed for the tribe of Levi.