Kitāb Sulaym is possibly the earliest Shīʿī work in existence and analysis of its constituent reports could shed light on aspects of early Shīʿī thought and doctrine. This paper examines one of its reports on the subject of ikhtilāf in Prophetic ḥadīth between the Shīʿa and their opponents, and the related subjects of the status of the Companions of the Prophet and the Prophet's transmission of his knowledge to ʿAlī. It suggests dates and contexts for the composition of the report and the updating it seems to have undergone. It shows that the report reflects moderate Imāmī attitudes and doctrines similar to those attested for other leading pre-ghayba Imāmīs.