'Brother' in the Bible

and so we sent Timothy, our brother and God’s servant in [spreading] the good news of Christ, to strengthen and encourage you [exhorting, comforting, and establishing you] in regard to your faith,

and that [in this matter of sexual misconduct] no man shall transgress and defraud his brother because the Lord is the avenger in all these things, just as we have told you before and solemnly warned you.