Jer 1:18

וַאֲנִ֞י הִנֵּ֧ה נְתַתִּ֣יךָ הַיּ֗וֹם לְעִ֨יר מִבְצָ֜ר וּלְעַמּ֥וּד בַּרְזֶ֛ל וּלְחֹמ֥וֹת נְחֹ֖שֶׁת עַל־כָּל־הָאָ֑רֶץ לְמַלְכֵ֤י יְהוּדָה֙ לְשָׂרֶ֔יהָ לְכֹהֲנֶ֖יהָ וּלְעַ֥ם הָאָֽרֶץ׃

Now behold, this day I have made you like a fortified city, an iron pillar, and bronze walls against the whole land—against the kings of Judah, its officials, its priests, and the people of the land.