6. [6/-] al-Kafi: A number of our companions from Ahmad b. Muhammad b. Khalid from his father from al-Nadhr b. Suwayd from Yahya al-Halabi from Ayyub b. al-Hur who said: I heard Aba Abdillah عليه السلام saying: everything is referred back to the Book and the Sunna, and

every Hadith that does not agree with the Book of Allah then it is a worthless embellishment.