'Eunuchs' in the Bible

On the seventh day, when the heart of the king was merry with wine, he commanded Mehuman, Biztha, Harbona, Bigtha, and Abagtha, Zethar, and Carcass, the seven eunuchs who served in the presence of Ahasuerus the king,

But the queen Vashti refused to come at the king's commandment by the eunuchs. Therefore the king was very angry, and his anger burned in him.

"What shall we do to the queen Vashti according to law, because she has not done the bidding of the King Ahasuerus by the eunuchs?"

In those days, while Mordecai was sitting in the king's gate, two of the king's eunuchs, Bigthan and Teresh, who were doorkeepers, were angry, and sought to lay hands on the King Ahasuerus.

Esther's maidens and her eunuchs came and told her this, and the queen was exceedingly grieved. She sent clothing to Mordecai, to replace his sackcloth; but he didn't receive it.

Then Esther called for Hathach, one of the king's eunuchs, whom he had appointed to attend her, and commanded him to go to Mordecai, to find out what this was, and why it was.

It was found written that Mordecai had told of Bigthana and Teresh, two of the king's eunuchs, who were doorkeepers, who had tried to lay hands on the King Ahasuerus.

While they were yet talking with him, the king's eunuchs came, and hurried to bring Haman to the banquet that Esther had prepared.

Then Harbonah, one of the eunuchs who were with the king said, "Behold, the gallows fifty cubits high, which Haman has made for Mordecai, who spoke good for the king, is standing at Haman's house." The king said, "Hang him on it!"