12 For there are eunuchs who were born that way from their mother’s womb, and there are eunuchs who were made eunuchs by men; and there are eunuchs who made themselves eunuchs for the Kingdom of Heaven’s sake. He who is able to receive it, let him receive it.”
Matthew 19:12 Cross References - WEB
Isaiah 39:7
7 ‘They will take away your sons who will issue from you, whom you shall father, and they will be eunuchs in the king of Babylon’s palace.’”
Isaiah 56:3-4
1 Corinthians 7:32-38
32 But I desire to have you to be free from cares. He who is unmarried is concerned for the things of the Lord, how he may please the Lord;
33 but he who is married is concerned about the things of the world, how he may please his wife.
34 There is also a difference between a wife and a virgin. The unmarried woman cares about the things of the Lord, that she may be holy both in body and in spirit. But she who is married cares about the things of the world—how she may please her husband.
35 This I say for your own profit; not that I may ensnare you, but for that which is appropriate, and that you may attend to the Lord without distraction.
36 But if any man thinks that he is behaving inappropriately toward his virgin, if she is past the flower of her age, and if need so requires, let him do what he desires. He doesn’t sin. Let them marry.
37 But he who stands steadfast in his heart, having no urgency, but has power over his own will, and has determined in his own heart to keep his own virgin, does well.
38 So then both he who gives his own virgin in marriage does well, and he who doesn’t give her in marriage does better.
1 Corinthians 9:5
5 Have we no right to take along a wife who is a believer, even as the rest of the apostles, and the brothers of the Lord, and Cephas?
1 Corinthians 9:15
15 But I have used none of these things, and I don’t write these things that it may be done so in my case; for I would rather die, than that anyone should make my boasting void.