Imam al-Tirmidhi devoted the utmost care to the ḥasan ghayruh (fair due to others) in his book al-Jāmiʿ, and his approach received full appreciation from the scholars of ḥadīth. They regarded it as a scholarly foundation to be referenced for this category. Ibn al-Ṣalāḥ said in ʿUlūm al-Ḥadīth (1): "The book of Abū ʿĪsā, may God have mercy on him, is a foundation for the knowledge of the ḥasan ḥadīth, and it is he who brought attention to its name and mentioned it frequently in his Jāmiʿ." Imam al-Tirmidhi also made clear his terminology for the ḥasan ḥadīth as he understood it, saying in al-ʿIlal al-Ṣaghīr (2): "Whatever we have mentioned in this book as a ḥasan ḥadīth, we only mean by it that its chain is ḥasan according to us: every ḥadīth that is narrated in whose chain there is no one accused of lying, and which is narrated through another route in a similar manner, is in our view a ḥasan ḥadīth." Ibn al-Ṣalāḥ added in ʿUlūm al-Ḥadīth (3): "And that it not be from the narration of one who is heedless and frequently mistaken." This addition, although not indicated by al-Tirmidhi's words here, is derived from his statement in al-ʿIlal before this: that whoever is heedless and frequently mistaken, his ḥadīth is not cited as evidence, nor is one occupied with narrating from him, according to the majority.

Among the examples of ḥasan ghayruh according to al-Tirmidhi:

1 - A ḥadīth he described as ḥasan, which is from the narration of a weak narrator with poor memory, narrated by him under number (1113) via Shuʿbah, from ʿĀṣim ibn ʿUbayd Allāh,--------------------------------------------
(1) p. 109.
(2) 6/251.
(3) p. 104.