the Fatwa Department Research Committee - chaired by Sheikh `Abd al-Wahhâb al-Turayrî
This is the old Shî`ah trick of mentioning hadîth from Sunni sources without discussing either the authenticity or the context of those hadîth. Please remember that hadîth may be authentic (sahîh), good (hasan), weak (da`îf) rejected (munkar) or fabricated (mawdû`). The scholars know the grading of a hadîth by studying its chains of transmission. A hadîth has no value whatsoever to us unless we know its level of authenticity.
Hadîth of all grades have been recorded with their full chains of transmissions in numerous compilations for various reasons. Few books were written with the objective of compiling only authentic hadîth (for example: Sahîh al-Bukhârî and Sahîh Muslim). Many books simply compile everything that has been received along with the chains of narration. These books are meant to be used as a resource for other scholars who can investigate the hadîth and determine their strength.
For this reason, you will find everything in “Sunnî” sources. What you need to know is that it is not the methodology of Ahl al-Sunnah wa al-Jamâ`ah to accept every hadîth that has been recorded, but to accept only hadîth with authentic or good chains of transmission.
None of the compilations that you mentioned above were compiled under the condition that all the hadîth contained therein were authentic.
Therefore, the issue at hand is not how many books record the hadîth, but whether or not the hadîth is authentic.
For example, they mention Majma` al-Zawâ’id by al-Haythamî. They fail to mention that Majma` al-Zawâ’id is merely a compilation of all the hadîth that were recorded in a number of rare hadîth books but were not recorded in the major six books of hadîth. The purpose of this book is to give people a handy reference for hadîth that are only found in rare hadîth works that are unlikely to be available in their personal libraries. One of the books that Majma` al-Zawâ’id draws from is al-Awsat by al-Tabarânî!
The only reason that this hadîth is in Majma` al-Zawâ’id is for the simple fact that it is found in al-Awsat and is not found in the six most authentic books! The Shî`ah mention Majma` al-Zawâ’id after mentioning al-Awsat just to make their list seem longer so they can impress Muslims who do not know much about hadîth.
Source: Islam Today