בֵּאדַ֛יִן דָּרְיָ֥וֶשׁ מַלְכָּ֖א שָׂ֣ם טְעֵ֑ם וּבַקַּ֣רוּ ׀ בְּבֵ֣ית סִפְרַיָּ֗א דִּ֧י גִנְזַיָּ֛א מְהַחֲתִ֥ין תַּמָּ֖ה בְּבָבֶֽל׃
Then Darius the king made a decree, and search was made in the house of the archives, where the treasures were laid up, in Babylon.
Read midrashic interpretation of Ezra 6:1: and classical rabbinic exegesis.