Allah (Exalted be He) says: "They (the disbelievers, the Jews and the Christians) want to extinguish Allâh's Light (with which Muhammad peace be upon him has been sent? Islâmic Monotheism) with their mouths, but Allâh will not allow except that His Light should be perfected even though the Kâfirûn (disbelievers) hate (it)." "It is He Who has sent His Messenger (Muhammad peace be upon him) with guidance and the religion of truth (Islâm), to make it superior over all religions even though the Mushrikûn (polytheists, pagans, idolaters, disbelievers in the Oneness of Allâh) hate (it)." (1)
In confirmation to this divine promise, Allah has assigned guardians to the Sunnah throughout history to guard it against the distortion, falsehood, and ignorance, therefore those guardians wrote many great writings anciently and recently in this field, of which:
1- Ar-Risalah (the message) and Ikhtilaf Al Hadith (Difference of Hadith) by Imam Al Shafi`y.
2- Ta`wil Mukhtalif Al Hadith (Interpretation of contradicted Hadiths) by Ibn Qutaybah.
3- Sharh Mushkal Al Athar (Explanation of contradicted narrations) by Imam At-Tahawy.
4- As-Sunnah Wa Makanataha Fi At-Tashri` Al Islamy (the Sunnah and its status in Islamic Shari`ah) by professor Mustafa As-Siba`y.
5- Difa`an `An As-Sunnah (In defence of the Sunnah) by professor Muhammad Abu Shuhbah.
6- Hujjiyat As-Sunnah (The Sunnah as a proof) by professor `Abdul-Ghany `Abdul-Khaliq.
7- Zhulumat Abu Rayyah (Darknesses of Abu Rayyah) by Sheikh Muhammad `Abdur-Raziq Hamzah.
8- Al Anwar Al Kashifah Lima Fi Kitab Adwa' `Ala As-Sunnah Min Al Zalal Wal Tadlil Wal Mujazafah (Guiding lights to the doubts, delusions, and ignorance reported in the book of Adwa' `Ala As-Sunnah) by `Abdul-Rahman Al Mu`alimy Al Yamany.
9- As-Sunnah Qabl At-Tadwin (The Sunnah before documentation) and Abu Hurayrah Rawiyat Al Islam (Abu Hurayrah the narrator of Islam) by professor Muhammad `Ajjaj Al Khatib.
10- Dirasat Fi Al Hadith An-Nabawy Wa Tarikh Tadwinuh (Studies in Prophetic Hadith and its history of documentation) by professor Muhammad Mustafa Al A`zhamy.
11- Al Hadith wa Al Muhaddithun (Hadith and its narrators) by Muhammad Abu Zahw.
12- As-Sunnah Fi Muwajahat Al Abatil (The Sunnah against falsehood) by Muhammad Tahir Hakim.
13- As-Sunnah Al Muftara `Alayha (the attacked Sunnah) and As-Sunnah Bayna Al Wahy Wal `Aql (The Sunnah between revelation and reason) by Counselor Salim Al Bahnasawy.
14- As-Sunnah An-Nabawiyyah Wa Mata`in Al Mubtadi`ah Fiha (the Prophetic Sunnah and the attacks of the attackers) by professor Mikky Al Shamy.
15- Al Mustashriqun Wal Hadith An-Nabawy (Orientalists and the Prophetic Hadith) by professor Muhammad Baha' Al Din.
16- As-Sunnah An-Nabawiyyah Bayna Du`at Al Fitnah Wa Ad`iya' Al `Ilm (The Prophetic Sunnah between the callers of sedition and the claimers of knowledge) by Professor `Abdul-Mawjud `Abdul-Latif.
17- Shubuhat Hawla As-Sunnah Wa Dahdiha (Doubts around the Sunnah and their refutations) by professor Khalil Mulla Khatir.
18- Ihtimam Al Muhadithin Benaqd Al Hadith Sanadan Wa Matnan Wa Dahd Maza`im Al Mustashriqin Wa Atba`ihim (The interest of the scholars of Hadith in criticizing Hadith texts and the chains of narrations, and refutation of the claims of orientalists and their followers) by professor Muhammad Luqman As-Salafy.
19- Al Qur'aniyyun Wa Shubuhatuhum Hawla As-Sunnah (Those who believe only in the Qur'an as a proof and their doubts about the Sunnah) by professor Khadim Husayn Ilahy Bakhsh.
20- Ad-Difa` `An As-Sunnah (Defending the Sunnah) and As-Sunnah Fi Muwajahat A`da'iha (The Sunnah against its enemies) Dalalat Munkiry As-Sunnah (The illusions of those who deny the Sunnah) by professor Taha Ad-Dusuqy Hibish.
21- Dawabit Al Riwayah `Anda Al Muhaddithin (Standards of accepting narration according to the scholars of Hadith) by professor As-Siddiq Bashir Nasr.
22- Daf` Ash-Shubuhat `An As-Sunnah An-Nabawiyayh (Defending the Prophetic Sunnah against doubts) by professor `Abdul-Muhdy `Abdul-Hady.
23- Mawqif Al Madrasah Al `Aqliyyah Min As-Sunnah An-Nabawiyyah (The stance of the rational school of thought toward the Prophetic Sunnah) by professor Amin As-Sadiq.
24- As-Sunnah An-Nabawiyyah Fi Kitabat A`da' Al Islam Munaqashatuha Wa Ar-Rad `Alayha (The Prophetic Sunnah in the writings of the enemies of Islam -discussion and refutation) by professor `Imad As-Sayyid Ash-Shirbiny.
25- As-Sunnah An-Nabawiyyah Bayna Kayd Al A`da' Wa Jahl Al Ad`iya' (The Prophetic Sunnah between the cunning of enemies and the ignorance of claimers of knowledge) by professor Hamdy As-Si`idy.
There are other books and letters in this field in addition to the efforts of the famous scientific foundations and websites.
Thus, we note that the scholars of the nation are full aware of the plots set against the fundamentals and sources of the nation. Doubts and delusions will reinforce their firm belief of their religion, strengthen their refutation to these claims, and add to their determination to continue. "So that those who were to be destroyed (for their rejecting the Faith) might be destroyed after a clear evidence, and those who were to live (i.e. believers) might live after a clear evidence." (2) "And those who do wrong will come to know by what overturning they will be overturned." (3)
(1) [Surat At-Tawbah: 32-33].
(2) [Surat Al Anfal: 42].
(3) [Surat Ash-Shu`ara': 227].