NET
5 So Esther called for Hathach, one of the king’s eunuchs who had been placed at her service, and instructed him to find out the cause and reason for Mordecai’s behavior.
Darby
5 Then Esther called for Hatach, [one] of the king's chamberlains, whom he had appointed to wait upon her, and gave him a commandment to Mordecai, to know what it was, and why it was.
KJV
5 Then called Esther for Hatach, [one] of the king's chamberlains, whom he had appointed to attend upon her, and gave him a commandment to Mordecai, to know what it [was], and why it [was].