So whoever opposes them, and does not say what they said, and does not believe what they believed; he is a misguided, misguiding innovator (1).
1- ʿAbd Allāh b. al-Mubārak said: The chain of transmission is from the religion; were it not for the chain of transmission, whoever wished would have said whatever he wished (2).
about the partisans of hadith: "These are the ones through whose transmission the Sharia has been safeguarded, and through whom the roots of the Sunna have been preserved. Thus, they are owed gratitude by the entire nation, and supplication to Allah for their forgiveness. They are the bearers of His knowledge, the transmitters of His religion, His emissaries between Him and His nation, and His trustees in conveying the revelation from Him. It is fitting that they be the people closest to him in his life and after his death. Every group among the nations refers back to them regarding the authenticity and weakness of his hadith... They are the Victorious Group, the Saved Sect, the Guiding Band, and the Just Congregation that holds fast to the Sunna, desiring no substitute for the Messenger of Allah, no alteration to his statement, and no deviation from his Sunna, nor are they deterred from it by the changing of eras and times..." etc.
And see the book: Sharaf Aṣḥāb al-Ḥadīth by al-Khaṭīb al-Baghdādī.