'Brother's' in the Bible

And why do you look at the splinter in your brother's eye, and not notice the beam which is in your own eye?

Hypocrite, first take the beam out of your own eye, and then you will see clearly how to remove the splinter from your brother's eye.

For John had repeatedly told Herod, "You have no right to be living with your brother's wife."

But Herod the Tetrarch, being repeatedly rebuked by him about Herodias his brother's wife, and about all the wicked deeds that he had done,

"And why look at the splinter in your brother's eye instead of giving careful attention to the beam in your own?

How can you say to your brother, 'Brother, let me take that splinter out of your eye,' when all the while you yourself do not see the beam in your own eye? Vain pretender! take the beam out of your own eye first, and then you will see clearly to take the splinter out of your brother's eye.

Therefore let us no longer judge one another; but, instead of that, you should come to this judgement--that we must not put a stumbling-block in our brother's path, nor anything to trip him up.

The right course is to forego eating meat or drinking wine or doing anything that tends to your brother's fall.

We are not to resemble Cain, who was a child of the Evil one and killed his own brother. And why did he kill him? Because his own actions were wicked and his brother's actions righteous.