Now Adam had sexual relations with his wife, Eve, and she became pregnant. When she gave birth to Cain, she said, “With the Lord’s help, I have produced a man!”
And I will cause hostility between you and the woman, and between your offspring and her offspring. He will strike your head, and you will strike his heel.”
After sending them out, the Lord God stationed mighty cherubim to the east of the Garden of Eden. And he placed a flaming sword that flashed back and forth to guard the way to the tree of life.
Adam had sexual relations with his wife again, and she gave birth to another son. She named him Seth, for she said, “God has granted me another son in place of Abel, whom Cain killed.”
We must not be like Cain, who belonged to the evil one and killed his brother. And why did he kill him? Because Cain had been doing what was evil, and his brother had been doing what was righteous.