Matthew 19:12
For there are some eunuchs, which were so born from their mother’s womb: and there are some eunuchs, which were made eunuchs of men: and there be eunuchs, which have made themselves eunuchs for the kingdom of heaven’s sake. He that is able to receive it, let him receive it.
Those who have made themselves eunuchs for the kingdom of heaven's sake are those who set aside ordinary family claims and personal plans in order to serve God's kingdom. Sabbath keepers are among these, in that they accept self-denial and consecration to God's work for the kingdom's sake. To those who make this self-denial is promised a name and a place in God's house that is better than that of sons and of daughters.