Karr (2022): "The date of SY's [note Sefer Yetzirahs] composition remains a matter of some debate, though most scholars agree that it was written or compiled between the second and sixth centuries. However, Steven M.Wasserstrom has offered a strong case for the ninth century within an Islamic milieu. It was certainly extant by the tenth century, for it exerted a great influence on speculative and mystical thought from that time on." Karr, Don (2022). "Notes on Editions of Sefer Yetzirah in English"(PDF). Digital-brilliance.com. Retrieved 2024-07-01.
Saadia Gaon (1972), p. 46. Saadia Gaon (1972). Qafih, Yosef (ed.). Sefer Yetzirah (Kitāb al-mabādī), with a Translation and Commentary by Rabbi Saadia Gaon (in Hebrew). Jerusalem: Committee for the publication of Rabbi Saadia Gaon's books (in affiliation with the American Academy of Jewish Studies). OCLC319752519.
Saadia Gaon (1972), p. 35. Saadia Gaon (1972). Qafih, Yosef (ed.). Sefer Yetzirah (Kitāb al-mabādī), with a Translation and Commentary by Rabbi Saadia Gaon (in Hebrew). Jerusalem: Committee for the publication of Rabbi Saadia Gaon's books (in affiliation with the American Academy of Jewish Studies). OCLC319752519.