'Brothers' in the Bible

Then Adonijah put to death sheep and oxen and fat beasts by the stone of Zoheleth, by En-rogel; and he sent for all his brothers, the king's sons, and all the men of Judah, the king's servants, to come to him:

The Lord has said, You are not to go to war against your brothers, the children of Israel; go back, every man to his house, because this thing is my purpose. So they gave ear to the word of the Lord, and went back, as the Lord had said.