Al-Sayyid Hashim Maruf al-Husayni states...
Al-Sayyid Hashim Maruf al-Husayni states: "The mutaqaddimun have not had any ijma on relying on all the traditions of al-Kafi.,26 He also says: "Al-Kafi contains 16199 traditions; among these 5072 are 144 hasan, 1128 muwaththaq, 302 qawi,, and 9480 daif."27 This break-up is based only on the basis of scrutiny concerning the chains of transmission, not that of the texts of the traditions.
It may be said that most of the traditions-entailing tahrif belong to the class of daif traditions whose chains terminate at weak narrators (du'afa)28 'and those who have been accused of ghuluww or professing deviate doctrines. The greater part of these traditions have at their source Ahmad ibn Muhammad al-Sayyari.
Al-Shaykh Mirza Mehdi al-Burujerdi observes: "I have counted the traditions on tahrif and have found more than 188 of them terminating at al-Sayyari." We have also counted these traditions and have found more than 300 of them coming from him. Al-Shaykh al-Najashi in his book on rijal speaks about al-Sayyari: ضعيف الحديث، فاسد المذهب، و .A weak narrator of traditions, of devious beliefs.
Al-Najashi's statement about him indicates that al-Sayyari had been accused of ghuluww.29 Al-Shaykh al-Tusi has also considered him daif in al-Istibsar after narrating a tradition from him.'30 Ibn Al-Ghadairi makes this statement about al-Sayyari: يُكَنَّى ابا عبيد الله المعروف بالسياري، ضعيف متهالك غال منحرف".
'His sobriquet - Abu Abadullah and popularly known as al-Sayyari; (is) za'if, weak, ghalli and deviate.'31 Al-Shaykh al-Tusi describes al-Sayyari as: ضعيف الحديث، فاسد المذهب، مَجفُو الرواية كثير المراسيل 'A daif narrator, professing deviate doctrines, his traditions are not accepted, and most of his traditions are mursal32 Another of the narrators of these traditions is Yunus ibn Zabyan about whom al-Najashi remarks:ضعيف جدا، لا يلتفت الى ما رواه، كل كتبه تخليط ' Very daif; no attention is given to what he has narrated; all his books are confused and delirious.' Ibn al- Ghada'iri says of him: ابن ظبيان كوفي غال كذّاب وضَّاع الحديث Ibn Zabyan, a Kufi,a ghali,a liar,a fabricator of traditions.33 Mankhal ibn Jamil al-Kufi is also one of these narrators and writers on rijal have this to say about him: ضعيف فاسد الرواية!