you got your brothers crossed
Cain, in the Bible (Hebrew Bible, or Old Testament), firstborn son of Adam and Eve who murdered his brother Abel (Genesis 4:1–16). Cain, a farmer, became enraged when the Lord accepted the offering of his brother, a shepherd, in preference to his own. He murdered Abel and was banished by the Lord from the settled country. Cain feared that in his exile he could be killed by anyone, so the Lord gave him a sign for his protection and a promise that if he were killed, he would be avenged sevenfold.
https://www.britannica.com/biography/Cain-biblical-figure