There is claim made by some people that ḥadīth scholars are not expert in the field of Islamic Jurisprudence. Thus, this study discusses the expertise and contribution of ḥadīth scholars in this field. This is to prove how accurate the claim is that the ḥadīth scholars are not expert in the Islamic Jurisprudence.This study will apply the inductive and deductive methodologies in order to analize data collected in this study. The findings of the study indicate that there are ḥadīth scholars having their own mazhab of fiqh. There were also ḥadīth scholars who were appointed judges in the courts in their time. The scholars of ḥadīth also emphasize the importance of the fiqh of ḥadīth so as to make it part of the sciences of ḥadīth. The conclusion of this study is that the claim stating the ḥadīth scholars are not experts in the Islamic Jusrisprudence is completely not true.

This study reviews on the fabrication of hadith and its implication on society. By adopting content analysis method, this study found the first crisis to afflict the Muslim community when the Prophet's was left and rising the question who would succeed him as religious and political leader turn around the claims about the Prophet's words. It was a crucially malicious for the society due to their religious practices would be denied and even defaces their religious grasps. It was further more complicated, in which some of the people in a vulnerable and accept all the utterances purportedly attributed to the Prophet, without trying to find clarity about the authentic hadith, weak, or false. Certainly this causes serious results, because the damages which found on a fabricated hadith will be accepted and believed as the truth eventually. Hence, the scholars of hadith have always been tried to explain the position of the hadiths which are spread among the Muslims, as evidence of God's care for the purity of Islam until the end of time.

The one who looks at the books of hadith sciences will find that the hadith scholars have mentioned several reasons for the contradiction between the hadiths. They said that among these reasons is the mistake of narrators. However, when they elaborate this reason, they did not detail the factors that make the narrators mistaken in their narratives. Nor did they focus their research on the narrations of the Prophet’s biography. This research attempts to focus on the narrations of the Prophet's biography to extract these factors. This is done by adapting the inductive and critical analytical method. After research, it became clear that the narrators’ mistakes are among the most important reasons for the contradiction between the narrations of the Prophet’s biography and that these mistakes also have factors including similarities in the subject of the narrations.

It is affirmed between scholars that al-Isti’nas (leniency in the usage of al-Maghazi and al-Siyar as supporting evidence in argument) of the narration of al-Maghazi and al-Siyar is a process applied by Hadith scholars previously and contemporarily. Ibn Qayyim al-Jauziyyah is among the Muslim scholars who apply al-Isti’nas of the narration of al-Maghazi and al-Siyar in his book Zad al-Ma’ad. This study aims at revealing the methodology of Ibn al-Qayyim in the process of al-Isti’nas of the narration of al-Maghazi and al-Siyar in his book Zad al-Ma’ad. This study focuses on terms of al-Isti’nas in his point of view and its areas. This study concludes that al-Isti’nas of the narration of al-Maghazi and al-Siyar in Ibn al-Qayyim’s point of view is abide with certain terms and areas. There are also many benefits as a result of this process.