Öz:The majority of Islāmic scholars agree that the Sunnah is the second source of Islāmic Law after the Qur’ān. However, the issue of using the Khabar al-wahid as evidence in religious decrees has been the subject of serious discussions - because the substrate is presumed- since the first periods. In particular, Abū Ḥanīfa, the founding imām of the Hanafī madhhab, was accused of not using the Khabar al-wahid as evidence, it was claimed that he gave a verdict with his ruling. However, many works have been written to prove that Abū Ḥanīfa's claim that he did not use the akhbar al-ahad as evidence is unfounded. Jassas also covered the subject extensively in his works to show that this claim is not true. In this context, the fact that he wrote the first usūl and many furūʿ al-fiḳh works, which includes the view of the Hanafīs to the Akhar al-aḥad and resource value of the akhbar al-āḥād by the Hanafī madhhab, adds a special value to Jassas's statements. In this study, the evaluations of the Hanafī scholar Jassas, who helped the founding imāms of the Hanafī madhhab and their students to transfer their understanding of fiḳh to the next periods, will be discussed. Jassas's fiḳh work called Muhtasar al-Ṭahawi will be examined in general and his approach to Khabar al-wāḥid will be explained within the framework of the related work.