Commentary for Ezra 4:24

Then Then the work of the building of the House of God, which was in Jerusalem, was suspended until the second year of Darius, the king of Persia; for after Cyrus, Ahasuerus, who married Esther, reigned, and after Ahasuerus, Darius, the son of Ahasuerus, who was the son of Esther, reigned. And from the first year of Cyrus, the king of Persia, until the second year of Darius were eighteen years, which completed the seventy years from the destruction of Jerusalem. For from the destruction of the Temple, when Zedekiah was exiled, until the first year of Cyrus, were fifty-two years, as is explained in Seder Olam (ch. 29). There were then eighteen years from the first year of Cyrus until the second year of Darius, totaling a complete seventy years, and in the second year of Darius they commenced to build the Temple until they completed it.