Genesis 4:8 King James Version
8 And Cain talked with Abel his brother: and it came to pass, when they were in the field, that Cain rose up against Abel his brother, and slew him.
According to the Book of Jubilees, Cain murdered his brother with a stone. The Book of Jubilees, sometimes called Lesser Genesis (Leptogenesis), is an ancient Jewish religious work of 50 chapters, considered canonical by the Ethiopian Orthodox Church as well as Ethiopian Jews. Jubilees is considered one of the pseudepigrapha by Roman Catholic, Protestant, and Eastern Orthodox Churches. It is also not considered canonical within Judaism outside of Beta Israel.
Afterwards, Cain was killed by the same type of object he used against his brother; his house fell on him and he was killed by its stones. A heavenly law was cited after the narrative of Cain’s death saying: With the instrument with which a man kills his neighbour with the same shall he be killed; after the manner that he wounded him, in like manner shall they deal with him.
A Talmudic tradition says that after Cain had murdered his brother, God made a horn grow on his head. Later, Cain was killed at the hands of his great grandson Lamech, who mistook him for a wild beast.
A Christian version of this tradition from the time of the Crusades holds that the slaying of Cain…