Ezra 7:23

Wrath against the realm. In the seventh year of Artaxerxes I there was “wrath against the realm” of Persia of a most serious nature. Egypt had revolted from the Persians c. 463 B.C., and in the following year, with the assistance of the Athenians, had driven the last Persian out of the country. Toward the close of 459 a vain attempt was made to force Athens to recall her troops. In 458 Artaxerxes resolved to attempt the recovery of the revolted country. Soon thereafter he issued this decree authorizing Ezra’s expedition to Jerusalem. History records that from the year 457 B.C. on things went well for the Persians in Egypt. Memphis was recovered in that year, and in 456 the Athenian troops were finally defeated and the province of Egypt recovered. And his sons. When Artaxerxes came to the throne he was still quite young, and it is not known how many sons he had in his seventh year. Ultimately, the number reached 18 (Ctesias Excursus Persika 44).