Analysis of information sources in references of the Wikipedia article "Polycephaly" in English language version.
25. Seder ha-Dorot, Tanna ve-Amoralm, s.v. . Pelemo, cites a state-ment of the Zohar indicating that Cain was exiled to a place known as "Arks," a locale in which everyone was born with two heads. Seder ha-Dorot explains R. Judah's retort as indicat-ing that Pelemo should go into exile to the same place to which Cain was exiled and that in that place he might appropriately pose his question but that elsewhere the question is frivolous and the intelocutor is deserving of excommunication. See also Zohar, Parashat Va-Ye, rei, p. 157a, and Zohar, introduction, p. 9b. The latter source speaks of descendants of Cain possessing two heads. Cf., R. Chaim Eleazar Shapiro, Ot klayyim ve-Sha-tom 27:9, note 13. See also Zohar, Hashmattot, Berrishit, pp. 2536-254a.
"וארקא (Ve-arqa), And earth—the verse should read וארעא (ve-ar'a), [469] but ארקא (arqa) is one of those seven earths below, [470] site of descendants of Cain. After he was banished from the face of the earth, [471] he descended there, generating offspring. [472] He blundered there, knowing nothing. It is a dual earth, dualized by darkness and light. [473] Two officials rule there, one ruling darkness, the other light, inciting one another. When Cain descended there, they joined together—were completed as one—entirely befitting the offspring of Cain. So they have two heads [474] like two snake, but the one of light rules—prevailing, defeating the other. So those of darkness merged in those of light, and they became one. Those two officials are Mrira and Kastimon, [475] who resemble six-winged holy angels. One resembles an ox, the other an eagle, but when they join they are transformed into the image of a human being. [476] ... footnote 474. two heads On the two-headed descendants of Cain, see Beit ha-Midrash, 4:151-52; Judah ben Barzillai, Peirush Sefer Yetsirah, 173; Tosafot, Menahot 37a, s.v. o qum gelei; Zohar 1:157a; 2:80a; ZH 9b; Ginzberg, Legends, 5:143 n. 34; Ta-Shma, HaNigleh she-ba-Nistar, 125, n.84.
R. Jeremiah b. Eleazar said: God created two countenances in the first man,8 as it says, Behind and before hast Thou formed me.9 And the rib which the Lord God had taken from man made he a woman.10 Rab and Samuel explained this differently. One said that [this 'rib'] was a face, the other that it was a tail.11 ... 8. And out of one of them Eve was made. 9. Ps. CXXXIX, 5. E.V. 'Thou host hemmed me in'. 10. Gen. II, 22. 11. I.e., projected like a tail.
Pelemo enquired of Rabbi, If a man has two heads on which one must he put the tefillin?' 'You must either leave',10 he replied, 'or regard yourself under the ban'. In the meantime there came a man [to the school] saying, 'I have begotten a first-born child with two heads, how much must I give the priest?'11 An old man came forward and ruled that he must give [the priest] ten sela's... [footnotes] (10) Sc. the school. Rabbi thought that this question was put merely from a desire to scoff at him. (11) For his redemption. The fixed sum for redemption was five shekels (sela's in the Rabbinic tongue), cf. Num. XVIII, 16.
{{cite web}}: CS1 maint: numeric names: authors list (link)דאמר ר' ירמיה בן אלעזר דו פרצופין ברא הקב"ה באדם הראשון... רב ושמואל חד אמר פרצוף וחד אמר זנב
בעא מיניה פלימו מרבי מי שיש לו שני ראשים באיזה מהן מניח תפילין א"ל או קום גלי או קבל עלך שמתא אדהכי אתא ההוא גברא א"ל איתיליד לי ינוקא דאית ליה תרי רישי כמה בעינן למיתב לכהן אתא ההוא סבא תנא ליה חייב ליתן לו י' סלעים