While it is an often-parroted idea that the Sadducees accepted only the Torah, this view is in reality far from certain. Some Church Fathers like Hippolytus, (Refutation of all Heresies 9.24), Origen (Contra Celsum 1.49), and St. Jerome, (Commentary on Matthew 22:31f.) claimed that the Sadducees accepted only the Torah as scriptural, though they are too late to be reliable in this regard: their statements might just as well indicate a later confusion of the Sadducees with Samaritans. A passage in Josephus’ Antiquities (13.297 [10.6]) is sometimes read as evidence for this, but in context what he was actually talking about was the Sadducean rejection of Pharisaic traditions, without any indication of Scriptural canon:
What I would now explain is this, that the Pharisees have delivered to the people a great many observances by succession from their fathers, which are not written in the laws of Moses; and for that reason it is that the Sadducees reject them, and say that we are to esteem those observances to be obligatory which are in the written word, but are not to observe what are derived from the tradition of our forefathers.