Conflict Between Brothers is a Central Theme In OT History.
Gen 4:8 Cain spoke to Abel his brother. And when they were in the field, Cain rose up against his brother Abel and killed him.
Gen 21:9-10 But Sarah saw the son of Hagar the Egyptian, whom she had borne to Abraham, laughing. So she said to Abraham, "Cast out this slave woman with her son, for the son of this slave woman shall not be heir with my son Isaac.“
Gen 27:41 Now Esau hated Jacob because of the blessing with which his father had blessed him, and Esau said to himself, "The days of mourning for my father are approaching; then I will kill my brother Jacob."
Brothers Hating Brothers Climaxes with Jacob’s sons.
Genesis 37:1–11 (ESV) 37 Jacob lived in the land of his father’s sojournings, in the land of Canaan. 2 These are the generations of Jacob. Joseph, being seventeen years old, was pasturing the flock with his brothers. He was a boy with the sons of Bilhah and Zilpah, his father’s wives. And Joseph brought a bad report of them to their father. 3 Now Israel loved Joseph more than any other of his sons, because he was the son of his old age. And he made him a robe of many colors. 4 But when his brothers saw that their father loved him more than all his brothers, they hated him and could not speak peacefully to him.
5 Now Joseph had a dream, and when he told it to his brothers they hated him even more. 6 He said to them, “Hear this dream that I have dreamed: 7 Behold, we were binding sheaves in the field, and behold, my sheaf arose and stood upright. And behold, your sheaves gathered around it and bowed down to my sheaf.” 8 His brothers said to him, “Are you indeed to reign over us? Or are you indeed to rule over us?” So they hated him even more for his dreams and for his words.
9 Then he dreamed another dream and told it to his brothers and said, “Behold, I have dreamed another dream. Behold, the sun, the moon, and eleven stars were bowing down to me.” 10 But when he told it to his father and to his brothers, his father rebuked him and said to him, “What is this dream that you have dreamed? Shall I and your mother and your brothers indeed come to bow ourselves to the ground before you?” 11 And his brothers were jealous of him, but his father kept the saying in mind.
1Ki 12:16 -17 And when all Israel saw that the king did not listen to them, the people answered the king, "What portion do we have in David? We have no inheritance in the son of Jesse. To your tents, O Israel! Look now to your own house, David." So Israel went to their tents. But Rehoboam reigned over the people of Israel who lived in the cities of Judah.
John 1:11-13 He came to his own, and his own people did not receive him. But to all who did receive him, who believed in his name, he gave the right to become children of God, who were born, not of blood nor of the will of the flesh nor of the will of man, but of God.
John13:34-35 A new commandment I give to you, that you love one another: just as I have loved you, you also are to love one another. By this all people will know that you are my disciples, if you have love for one another.”
1Th 4:9 Now concerning brotherly love you have no need for anyone to write to you, for you yourselves have been taught by God to love one another, …
1John 3:10 By this it is evident who are the children of God, and who are the children of the devil: whoever does not practice righteousness is not of God, nor is the one who does not love his brother. For this is the message that you have heard from the beginning, that we should love one another.
1Peter 1:22-23 Having purified your souls by your obedience to the truth for a sincere brotherly love, love one another earnestly from a pure heart, since you have been born again, not of perishable seed but of imperishable, through the living and abiding word of God;
1John 4:11 Beloved, if God so loved us, we also ought to love one another.