'Brothers' in the Bible

Brothers, I write no new commandment to you, but an old commandment which you had from the beginning. The old commandment is the word which you heard from the beginning.

Do not be surprised, brothers, if the world hates you.

We know that we have passed from death to life because we love our brothers. The one who does not love remains in death.

This is how we have come to know love: He laid down His life for us. We should also lay down our lives for our brothers.