John Gill Commentary Esther 9:3

"And all the princes of the provinces, and the satraps, and the governors, and they that did the king`s business, helped the Jews; because the fear of Mordecai was fallen upon them." — Esther 9:3 (ASV)

And all the rulers of the provinces, and the lieutenants, and
the deputies, and officers of the king, blessed the Jews
Countenanced them and encouraged them, and gave them all assistance in their power; extolled them, as the word signifies, lifted them up, and spoke well of them, or praised them, as the Targum:

because the fear of Mordecai was upon them ;
he being now chief minister, they might fear, if they took part with the enemies of the Jews against them, they might be turned out of their places.