Describing Lawful Rule according to Khi？āb of the God

The subject “rule”, which is one of the most fundamental issues of the Islamic legal theory (usūl al-fiqh), has been in the center of methodological debates. There is one important term in this regard, which should be studied very carefully: Khi？āb(speech) of the God. It is because that, especially since the first period of Islam, it has been taken with some significant terms in the field of Kalāmsuch as Husn (pretty; good), Qubh (ugly; evil), and the quality of God’s talk. Yet, adopting this term in the description of the “rule” shows that Fiqh is based on divine inspiration, and it also emphasizes that even though there are some differences in details, wisdom of human being is not ignored when adjudicating. Moreover, it suggests that the validity or methodological accuracy of the “rule” which is adjudicated with ruling case is related to the connection through the term speech or divine inspiration. In this regard, Kalāmdimension of the term and its affect to legal theoretical discussions are very important in terms of historical process of the definition of the “rule” in Islamic law. In this study, I tried to examine whether or not the term “khi？ābof the God” which is used in the definition of the “rule” formed a limitation for consideration of legal evidence in Islamic law and if there is any limitation for the legal evidence regarding being only in the Qur’ān and the Sunnah due to this definition. Summary The “hukm (rule, arbritation, judgment, God’s will)”-as the backbone notion in usūl al-fiqhis one of the significant key notions discussed in the legal theory. Specifically, the term “khitabullah” mentioned in the definition of hukmis noteworthy to investigate. Since the early formation period of Islamic law, the term khitabullahhas been embraced along with the theological subjects: “husnand qubuh(the good and evil) and kalām(the attribute of speech to Allah)”. The term “khitabullah” in the definition of hukmemphasizes that indeed the source of fiqhis the revelation (wahy) and also emphasizes that the function of reason (‘aql) is not ignored in the process of adjudication- even if there are some nuances in details.Additionally, it presents that the validity or methodological accuracy of the “rule” which is adjudicated with ruling a case is connected to the term speech (khitāb), or in other words to revelation (wahy). On the whole, in the legal theory, the rule of Sharī‘ah is defined as God’s khitab(the communication of God), which means the demand of God relating to the acts of those who are subject of law or the effect of the khitābon the acts of