'Brother's' in the Bible

Why do you look at the speck that is in your brother’s eye, but do not notice the log that is in your own eye?

You hypocrite, first take the log out of your own eye, and then you will see clearly to take the speck out of your brother’s eye.

For John had been saying to Herod, “It is not lawful for you to have your brother’s wife.”

But when Herod the tetrarch was reprimanded by him because of Herodias, his brother’s wife, and because of all the wicked things which Herod had done,

Why do you look at the speck that is in your brother’s eye, but do not notice the log that is in your own eye?

Or how can you say to your brother, ‘Brother, let me take out the speck that is in your eye,’ when you yourself do not see the log that is in your own eye? You hypocrite, first take the log out of your own eye, and then you will see clearly to take out the speck that is in your brother’s eye.

Therefore let us not judge one another anymore, but rather determine this—not to put an obstacle or a stumbling block in a brother’s way.

not as Cain, who was of the evil one and slew his brother. And for what reason did he slay him? Because his deeds were evil, and his brother’s were righteous.