Charles Ellicott Commentary Nehemiah 11:23

"For there was a commandment from the king concerning them, and a settled provision for the singers, as every day required." — Nehemiah 11:23 (ASV)

The king’s commandment. —It seems that Artaxerxes had gone beyond the exemption of Ezra 7:24, and given them a daily allowance, which it was the business of Uzzi to see to.