eve of every Sabbath studying the Sepher Ietsirah; they created a three-year-old heifer and ate it."--Talmud treatise Sanhedrim, folio
- Koran, Sura LXXXVII. 10.
- Zohar, section Bereschith, folio 55, and section Lekh-Lekha, folio 76 (De Pauly's translation, Vol. I. pp. 431, 446).
- Adolphe Franck, La Kabbale, p. 39; J. P. Stehelin, The Traditions of the Jews, I. 145 (1748).
- Adolphe Franck, op. cit., p. 68, quoting Talmud treatise Sabbath, folio 34, Dr. Christian Ginsburg, The Kabbalah, p. 85; Drach, De l'Harmonie entre l'Église et la Synagogue, I. 457.
- Adolphe Franck, op. cit., p. 69.
- Dr. Christian Ginsburg (1920), The Kabbalah, pp. 172, 173.
- Vulliaud, op. cit., I. 253.
- Ibid., p. 20, quoting Theodore Reinach, Historie des Israelites, p. 221, and Salomon Reinach, Orpheus,