S. Methodius the Younger refers to this tradition. He says: “Be it known that Adam and Eve when they left Paradise were virgins. But the third year after the expulsion from Eden, they had Cain, their first-born, and his sister Calmana; and after this, next year, they had Abel and his sister Deborah. But in the three hundredth year of Adam’s life, Cain slew his brother, and Adam and Eve wailed over him a hundred years.”[112] Eutychius, Patriarch of Alexandria, says, “When Adam and Eve rebelled against God, He expelled them from Paradise at the ninth hour on Friday to a certain mountain in India, and He bade them produce children to increase and multiply upon the earth. Adam and Eve therefore became parents, first of a boy named Cain, and of a girl named Azrun, who were twins; then of another boy named Abel, and of a twin sister named Owain, or in Greek Laphura. “Now, when the children were grown up, Adam said to Eve, ‘Let Cain marry Owain, who was born with Abel, and let Abel have Azrun, who was born with Cain.’ But Cain said to his mother, ‘I will marry my own twin sister, and Abel shall marry his.’ For Azrun was prettier than Owain. But when Adam heard this, he said, ‘It is contrary to the precept that thou shouldst marry thy twin sister.’ “Now Cain was a tiller of the ground, but Abel was a pastor of sheep. Adam said to them, ‘Take of the fruits of the earth, and of the young of the sheep, and ascend the top of this holy mountain, and offer there the best and choicest to God.’ Abel offered of the best and fattest of the first-born of the flock. Now as they were ascending the summit of the mountain, Satan put it into the head of Cain to kill his brother, so as to get Azrun. For that reason his oblation was not accepted by God. Therefore he was the more inflamed with rage against Abel, and as they were going down the mount, he rushed upon him and beat him about the head with a stone and killed him. Adam and Eve bewailed Abel a hundred years with the greatest grief.... And God cast out Cain whilst he was still unmarried into the land of Nod. But Cain carried off with him his sister Azrun.”[113] The Rabbi Zadok said, “This was the reason why Cain slew Abel. His twin sister and wife was not at all good-looking. Then he said, ‘I will kill my brother Abel, and carry off his wife.’”[114] Gregory Abulfaraj gives this account of the strife: “According to the opinion of Mar Theodosius, thirty years after he was expelled from Paradise, Adam knew his wife Eve, and she bore twins, Cain and his sister Climia; and after thirty more years she bore Abel and his twin sister Lebuda. Then, seventy years after when Adam wanted to marry one of the brothers with the twin sister of the other, Cain refused, asking to have his own twin sister.”[115] The Pseudo-Athanasius says, “Up to this time no man had died so that Cain should know how to kill. The devil instructed him in this in a dream.”[116]