'Brothers' in the Bible

[By] teaching these [things] to the brothers, you will be a good servant of Christ Jesus, trained in the words of the faith and of the good teaching that you have followed faithfully.

Do not rebuke an older man, but appeal to [him] as a father, younger men as brothers,

And those who have believing masters must not look down on [them] because they are brothers, but rather they must serve, because those who benefit by their service are believers and dearly loved.