'Brother' in the Bible

As if a friend, as if my brother, I walked habitually, As a mourner for a mother, Mourning I have bowed down.

A brother doth no one at all ransom, He doth not give to God his atonement.

Thou sittest, against thy brother thou speakest, Against a son of thy mother givest slander.

A stranger I have been to my brother, And a foreigner to sons of my mother.