where Anan's activities took place and that the Karaite sage Jacob Qirqisani never mentioned Anan's purported lineage or candidacy for exilarch. (See Karaite Anthology; Yale Judaica Series 7)

Anan ben David's Sefer ha-Miswot or "Book of the Precepts" was published about 770. He adopted many principles and opinions of other anti-rabbinic forms of Judaism. It has been suggested that he took much from the Sadducees and Essenes,