Esther 2:3

2:3 And let the king appoint officers throughout all the provinces of his kingdom to gather all the attractive young women to Susa the citadel, to the harem under the authority of Hegai, the king’s eunuch who oversees the women, and let him provide whatever cosmetics they desire.

Esther 2:14

2:14 In the evening she went, and in the morning she returned to a separate part of the harem, to the authority of Shaashgaz the king’s eunuch who was overseeing the concubines. She would not go back to the king unless the king was pleased with her and she was requested by name.

Esther 2:21

2:21 In those days while Mordecai was sitting at the king’s gate, Bigthan and Teresh, two of the king’s eunuchs who protected the entrance, became angry and plotted to assassinate King Ahasuerus.