Such eunuchs were known as castrati.

The loss of testosterone and lack of estrogen means their bodies take on the characteristics of post pubertal eunuchs.

As they went on the way, they came to some water, and the eunuch said, Behold, here is water. What is keeping me from being baptized?

When they came up out of the water, the Spirit of the Lord caught Philip away, and the eunuch didn't see him any more, for he went on his way rejoicing.

And as they went on their way, they came unto a certain water and the eunuch said, See, here is water what doth hinder me to be baptized?

And when they were come up out of the water, the Spirit of the Lord caught away Philip, that the eunuch saw him no more and he went on his way rejoicing.

The eunuch answered Philip, Who is the prophet talking about? About himself, or about someone else?

And the eunuch answered Philip, and said, I pray thee, of whom speaketh the prophet this? of himself, or of some other man?

After serving as a court eunuch from AD 75, he was given several promotions under the rule of Emperor He of Han.

Neither let the foreigner, who has joined himself to Yahweh, speak, saying, Yahweh will surely separate me from his people neither let the eunuch say, Behold, I am a dry tree.

Neither let the son of the stranger, that hath joined himself to the LORD, speak, saying, The LORD hath utterly separated me from his people neither let the eunuch say, Behold, I am a dry tree.

The sole existing sound recording of a castrato singer documents the voice of Alessandro Moreschi, the last eunuch in the Sistine Chapel choir, who died in 1922.

He took away the horses that the kings of Judah had given to the sun, at the entrance of the house of Yahweh, by the room of Nathan Melech the officer, who was in the court and he burned the chariots of the sun with fire.

And he took away the horses that the kings of Judah had given to the sun, at the entering in of the house of the LORD, by the chamber of Nathan melech the chamberlain, which was in the suburbs, and burned the chariots of the sun with fire.

The term has been translated as eunuchs (as in Sir Richard Burton's translation of the book), but these persons have also been considered to be the equivalent of the modern hijra of India.