Indeed, they were their students who themselves were mujtahid like imam abu yusuf, imam Muhammad, imam yahya, imam ibnul qasim, imam abdullah b ahmad etc, us, the random people, were not advised.
Commenting on these statements, Imam an-Nawawi (rahmatullah alayh) says:
"This which Imam ash-Shaafi has said does not mean that everyone who sees a sahih Hadith should say "This is the mathhab of ash-Shaafi," thus practicing on the zaahir (text/external or apparent meaning) of the Haditli.
This most certainly applies to only such a person who has the rank of ijtihad in the mathhab. It is a condition that he overwhelmingly believes that Imam ash-Shaafi was unaware of this Hadith or he was unaware of its authenticity. And this is possible only after having made a research of all the books of ash-Shaafi and similar other books of the Ashaab of ash-Shaafi, those who take (knowledge) from him and others similar to these (books). This is indeed a difficult condition (to fulfill). Few are there who measure up to this (standard).
What we have explained has been made conditional because Imam ash-Shaafi had abandoned acting on the zaahir (text) of many Ahadith, which he say and knew. However, by him was established proof for criticism in the Hadith or its abrogation or it's specific circumstance or its interpretation, etc. Hence, he was constrained to leave aside the hadith." (Ilaaus Sunan, Vol. 2, page 225)
Shaykh Abu Amr (rahmatullah alayh) said:
"It is not easy to act according to the aparrent (zahir) text of what Imam ash-Shaafi said. It is not lawful for (even) every Faqeeh (qualified Aalim who has deep insight) to act indepently with that which opines to be proof from the Hadith." (Ilaus Sunan, Vol. 2, page 225)
It also appears in Ilaaus Sunan of Muhaddith Zafar Ahmad Uthmani (rahmatullah alayh):
"Imam Sha'raani has also narrated it (i.e. the statement "When the authenticity of a Hadith is established, it is my mathhab."), attributing it to the four Imams. It is not hidden (from understanding) that this is for the one who has the ability (insight and qualifications) in the Nusoos and the knowledge of its clear laws and abrogations." Volume 2, page 226.
Discussing this statement in his treatise, Shaykh Yusuf bin Ismaail Nibhaani says
"Verily, the statement: "When the Hadith has been authenticated, then it is my mathhab" has been narrated from each of these four Imams who were free from personal opinion. The audience to whom this statement ("When the Hadith is Sahih, it is my mathhab.") was directed, is on his (the imam's) Ashaab (the Fuqaha of his Mathhab) who were the great and illustrious Aimmah among the great 'Ulama of his mathhab, those who where the Ahl at-Tarjeeh (a high category of 'Ulama). All of them who were the haafizeen of the Hadith of Rasulullah (s.a.s.) were fully aware of the daleels (proofs) of all the mathhabs These are the ones whom the Imam (of the mathhab) had directed his statement: "When the Hadith is Sahih, it is my mathhab" Verily, they (these great Fuqaha) are able to reconcile between the Hadith from which the Imam had derived proof, and the latest Hadith which was established as authentic after the Imam. They (these illustrious Fuqaha) can see which of the two Hadiths is more authentic, stronger and which of the two Hadiths is the later one so that the later one can be the Naasikh (abrogator) for the earlier one." (Hujjatullah alal Aalameen)
In fact to be very sincere and straight forward, all such statements increase confusion and complications so much so that many people may run away from the understanding of the Deen. When I tried to understand the Holy Quraan through the tafaseer of great scholars, it became very easy to understand ahaadeeth and Islam as whole. Then we must also consider the basic principles. The basic principles are that in the grave everyone of this Ummah will be asked about Muhammad salla Allaho alayhi wa sallam only. Moreover, according to a Hadeeth Shareef, everyone will be forgiven by the shafaa'a (intercession) of Muhammad
salla Allaho alayhi wa sallam
except those who will be failed by the Holy Quraan. This clearly means that we must try to get the shafaa'a of the TWO i.e.
shafaa'a (intercession) of Muhammad salla Allaho alayhi wa sallam
and Shafaa'a of the Holy Quraan. So if we fear punishment in grave and in Hell then we must become close friends with these TWO sources of Islam.
Remember that according to a Hadeeth shareef, on the Day of Judgment (at some stage as there will be many stages for us to pass through),
Muhammad salla Allaho alayhi wa sallam
will be standing near the Hawz Al-kowsar /Al-Kowthar waiting for his ummah. A group of his sahaabah will appear coming and then a block will come between them and they will disappear. The Prophet salla Allaho alayhi wa sallam will say, " They were my sahaabah!" He will be replied, " You don't know what changes they made after you!"
Everyone of us must be as careful and worried for his own safety from Hell as he/she will be on the day of Judgment. At that time everyone will say "nafsee, nafsee" ("myself, myself"). Keeping that hard situation in mind, we are not supposed to fight for others when even we don't know for sure what they did or/and who brought the changes. We only must try to find the 100 % true source for our guidance and that is the Holy Quraan. After understanding the Holy Quraan, we must check the matan (content) of ahadeeth in the light of the Holy Quraan, believing that Muhammad
salla Allaho alayhi wa sallam
didn't say or do anything against the Book of Allah.
For myself, I testify that I am a Muslimah (a suni Muslimah) only. I only belong to the Muslim Ummah of
Muhammad salla Allaho alayhi wa sallam
. I don't belong to any partition, madh-hab, differences which happened after
Muhammad salla Allaho alayhi wa sallam
and for which there is no proof in the Quraan and Hadeeth. I respect all true sincere scholars of Islam but I will not fight for any changes made in the Deen and then attributed to the sincere scholars. I am against all such changes and among all that forest of confusion, I can get very clear guidance from the Holy Quraan. The same I wish for all sincere Muslims who are worried about the Accounting in the Here-After.