In our Bibles the word “brotherly” comes from the word “philadelphia” which is the word that is used as a feeling of affection and trust that is proper among brothers of the same blood. We already know what the word “fraternal” means, then, starting from this definition, let’s go to the Bible:
1 Let brotherly love continue.
2 Do not forget to entertain strangers, for by so doing some have unwittingly entertained angels.
3 Remember the prisoners as if chained with them—those who are mistreated—since you yourselves are in the body also.