Esther 9:29

29. Wrote with all authority With all the royal prestige and official dignity that would attach to a document proceeding from the queen and the grand vizier, and with all the binding force that it would also carry from being the written statement of what all the Jews had voluntarily decreed and enjoined upon themselves. Esther 9:27; Esther 9:31.

To confirm this second letter That is, to give it the authority and force of law. It is called the second letter in reference to the previous epistle of Mordecai, (Esther 9:20,) and letter of Purim, because it established the feast of this name.