וְעַתָּ֗ה אֲלֵיכֶ֛ם הַמִּצְוָ֥ה הַזֹּ֖את הַכֹּהֲנִֽים

And now, O priests, this charge is for you: 

אִם־לֹ֣א תִשְׁמְע֡וּ וְאִם־לֹא֩ תָשִׂ֨ימוּ עַל־לֵ֜ב לָתֵ֧ת כָּב֣וֹד לִשְׁמִ֗י אָמַר֙ יְהוָ֣ה צְבָא֔וֹת וְשִׁלַּחְתִּ֤י בָכֶם֙ אֶת־הַמְּאֵרָ֔ה וְאָרוֹתִ֖י אֶת־בִּרְכֽוֹתֵיכֶ֑ם וְגַם֙ אָרוֹתִ֔יהָ כִּ֥י אֵינְכֶ֖ם שָׂמִ֥ים עַל־לֵֽב

Unless you obey and unless you lay it to heart, and do honor to My name—said the LORD of Hosts—I will send a curse and turn your blessings into curses. (Indeed, I have turned them into curses, because you do not lay it to heart.)

הִנְנִ֨י גֹעֵ֤ר לָכֶם֙ אֶת־הַזֶּ֔רַע וְזֵרִ֤יתִי פֶ֙רֶשׁ֙ עַל־פְּנֵיכֶ֔ם פֶּ֖רֶשׁ חַגֵּיכֶ֑ם וְנָשָׂ֥א אֶתְכֶ֖ם אֵלָֽיו

I will put your seed under a ban, and I will strew dung upon your faces, the dung of your festal sacrifices, and you shall be carried out to its [heap]. 

Malachi 2:1-3

(Sefaria)