'Brothers' in the Bible

If you instruct the brothers of these things, you will be a good servant of Christ Jesus, nourished in the words of the faith, and of the good doctrine which you have followed.

Don't rebuke an older man, but exhort him as a father; the younger men as brothers;

Those who have believing masters, let them not despise them, because they are brothers, but rather let them serve them, because those who partake of the benefit are believing and beloved. Teach and exhort these things.