'Brothers' in the Bible

Then Abner called to Joab and said, “Shall the sword devour forever? Do you not know that it will be bitter in the end? How long will you refrain from telling the people to turn back from following their brothers?”

Then Abner was very angry over the words of Ish-bosheth and said, “Am I a dog’s head that belongs to Judah? Today I show kindness to the house of Saul your father, to his brothers and to his friends, and have not delivered you into the hands of David; and yet today you charge me with a guilt concerning the woman.

You came only yesterday, and shall I today make you wander with us, while I go where I will? Return and take back your brothers; mercy and truth be with you.”

You are my brothers; you are my bone and my flesh. Why then should you be the last to bring back the king?’

And behold, all the men of Israel came to the king and said to the king, “Why had our brothers the men of Judah stolen you away, and brought the king and his household and all David’s men with him over the Jordan?”