In the citadel of Susa, the Jews killed and destroyed five hundred men,
We have here a decisive battle fought between the Jews and their enemies, in which the Jews were victorious. Neither side was surprised; for both had notice of it long enough before, so that it was a fair trial of skill between them. Nor could either side call the other rebels, for they were both supported by the royal authority. I. The enemies of the Jews were the aggressors.
Commenting on Esther 9:1-19
And in Shushan the palace the Jews slew and destroyed five hundred men. Not in the royal palace, where it cannot be thought the Jews had so many enemies, or such a bloody slaughter of them should be made there; but in the city, where the palace was: and this may seem somewhat wonderful, that there should so many rise there against the Jews, so...
And in Shushan the palace the Jews slew and destroyed five hundred men. (d) Besides the three hundred that they slew the second day, .