John Gill Commentary Esther 9:14

"And the king commanded it so to be done: and a decree was given out in Shushan; and they hanged Haman`s ten sons." — Esther 9:14 (ASV)

And the king commanded it so to be done: and the decree was
given at Shushan
That the Jews might have leave to seek out and slay the rest of their enemies in Shushan, on the fourteenth day, in like manner as they had on the thirteenth:

and they hanged Haman's ten sons ;
on the same gallows very probably their father was hanged; the Targum gives us the distance between each person hanged thereon.