Matthew Poole and continuators on Esther 9:29

29 Then Esther the queen, the daughter of Abihail, and Mordecai the Jew, wrote with all authority , to confirm this second letter of Purim.

The former Letter v. 20. did only recommend, but this enjoins, the observation of this solemnity; because this was not only Mordecai's Act, who yet had by the King's Grant a great Power and Authority over the Subjects of that Kingdom, and consequently over the Jews, but it was the Act of all the Jews, binding themselves and Posterity to it, v. 27. Or, with all might or efficacy, and as that word usually signifies; He pres[illegible: 1+ letters]ed it with all earnestness and vehemency.

Marginal references: Heb. all strength.