'Brotherly' in the Bible
Thus says the Lord: For three transgressions of Tyre and for four [for multiplied delinquencies], I will not reverse the punishment of it or revoke My word concerning it, because they [as middlemen] delivered up a whole [Jewish] population to Edom and did not [seriously] remember their brotherly covenant.
Love one another with brotherly affection [as members of one family], giving precedence and showing honor to one another.
But concerning brotherly love [for all other Christians], you have no need to have anyone write you, for you yourselves have been [personally] taught by God to love one another.
Practice hospitality to one another (those of the household of faith). [Be hospitable, be a lover of strangers, with brotherly affection for the unknown guests, the foreigners, the poor, and all others who come your way who are of Christ's body.] And [in each instance] do it ungrudgingly (cordially and graciously, without complaining but as representing Him).
And in [exercising] godliness [develop] brotherly affection, and in [exercising] brotherly affection [develop] Christian love.