The things, then they said: These hadiths are narrated, and we believe in them, and it is not said: How? And this is what the people of hadith chose—that they narrate these things as they came, and believe in them, and they are not interpreted, nor are they imagined, nor is it said: How. And this is the matter of the people of knowledge which they chose and adopted.

His methodology in jurisprudence, and whether he attributed himself to one of the followed imams, and took from their opinions, and relied upon them:

Indeed, the Jami' of Abu 'Isa is replete with the transmission of jurisprudential schools, and the sayings of the Companions and the Followers, and the four followed imams, and others among the well-known schools of jurisprudence in his era, such as Imam al-Awza'i, the imam of the people of Syria, and Sufyan al-Thawri, the imam of the people of Iraq, and Ishaq ibn Ibrahim al-Hanzali, known as Ibn Rahawayh, the imam of the people of Khurasan, and 'Abdullah ibn al-Mubarak. Thus, it is counted among the authentic references on the schools of the scholars and the disagreements of the mujtahids, and it is the oldest work that has reached us concerning the aspects of disagreement.

For the scholar Abu al-Hasan al-Nadwi, may Allah have mercy on him, said: Al-Tirmidhi was among the first to address the subject that people today call comparative jurisprudence, and he had a great merit that the Ummah must acknowledge in his preservation of the jurisprudence of the ijtihad schools of his era, and were it not for him, much of it would have been lost and erased by time. And that is a distinctive feature of his Jami' by which he was uniquely distinguished among the rest.