וְשָׁבַרְתִּ֖י אֶת־גְּא֣וֹן עֻזְּכֶ֑ם וְנָתַתִּ֤י אֶת־שְׁמֵיכֶם֙ כַּבַּרְזֶ֔ל וְאֶֽת־אַרְצְכֶ֖ם כַּנְּחֻשָֽׁה׃
And I will break the pride of your power; and I will make your heaven as iron, and your earth as brass.
Read kabbalistic (mystical) interpretation of Leviticus 26:19: and classical mystical sources.