תַּ֣חַת הַנְּחֹ֜שֶׁת אָבִ֣יא זָהָ֗ב וְתַ֤חַת הַבַּרְזֶל֙ אָ֣בִיא כֶ֔סֶף וְתַ֤חַת הָֽעֵצִים֙ נְחֹ֔שֶׁת וְתַ֥חַת הָאֲבָנִ֖ים בַּרְזֶ֑ל וְשַׂמְתִּ֤י פְקֻדָּתֵךְ֙ שָׁל֔וֹם וְנֹגְשַׂ֖יִךְ צְדָקָֽה׃
For brass I will bring gold, And for iron I will bring silver, And for wood brass, And for stones iron; I will also make thy officers peace, And righteousness thy magistrates.
Read kabbalistic (mystical) interpretation of Isaiah 60:17: and classical mystical sources.