الصفوة

"Al-Safwa", a book by al-Mas'udi that describes what people have said about the imamate. ²

Al-Mas'udi refers to it in "Muruj al-Dhahab" at the point where sects dispute the faith of Abd al-Muttalib. ²

A further source is needed: the data does not record the book's own position on the question.