'Brethren' in the Bible

And there was given to each of them a white robe; and they were told that they should rest for a little while longer, until the number of their fellow servants and their brethren who were to be killed even as they had been, would be completed also.

Then I heard a loud voice in heaven, saying,“Now the salvation, and the power, and the kingdom of our God and the authority of His Christ have come, for the accuser of our brethren has been thrown down, he who accuses them before our God day and night.

Then I fell at his feet to worship him. But he *said to me, “Do not do that; I am a fellow servant of yours and your brethren who hold the testimony of Jesus; worship God. For the testimony of Jesus is the spirit of prophecy.”

But he *said to me, “Do not do that. I am a fellow servant of yours and of your brethren the prophets and of those who heed the words of this book. Worship God.”