Hukmu sharʼi shi ne maganar Mai Shari'a da ta shafi ayyukan bayi ('ibaad). Ya kasu kashi biyu: ko dai an tabbatar da shi da hujja qat'iyya (qat'iy uthuboot), kamar Alqur'ani da hadisi mutawatir, ko kuma an tabbatar da shi da hujja zato (dhanniy uthuboot), kamar hadisi wanda ba mutawatir ba. Idan an tabbatar da shi da hujja qat'iyya kuma ma'anarsa ta bayyana sarai, babu shakka (qat'iy udalalah), to hukuncin zai zama qat'i. Misali na haka shi ne adadin dukkan raka'o'in sallah da aka wajabta, kamar yadda suka zo a hadisi mutawatir. Haka nan, haramcin riba, yankewar hannun barawo, da bulalar zina (zani) su ne hukunce-hukunce qat'i wadanda ingancinsu tabbatacce ne, inda ba a samu wata ra'ayi ba face guda daya wacce aka tabbatar da ita da hujja qat'iyya.

Hukm shar’ai is the speech of the Legislator related to the actions of the servants ('ibaad). It is either conclusively proven (qat'iy uthuboot), such as the Qur'an and hadith mutawatir or inconclusively proven (dhanniy uthuboot) such as the non-mutawatir hadith. If it is qat'iy uthuboot and its meaning is definitive (qat'iy udalalah), the hukm will be conclusive. An example of this is the number of all prescribed raka'ah in salat, as they are mentioned in the hadith mutawatir. Likewise, the prohibition of riba, the amputation of the hand of the thief, and the lashing of the zani (adulterer) are conclusive rules whose correctness is definite, where there is only one single conclusively proven opinion.