About sunna, mandub, mubah, makruh, haram and everything forbidden

Types of human act

c2.1 (N:) The obligatory (fard) is that which the Lawgiver strictly requires be done, Someone who performs an obligatory act out of obedience to Allah is rewarded, while a person who refrains from it without excuse deserves to be punished.

(A: In the Shafi'i school there is no difference between obligatory (fard) and requisite (wajib) except in the pilgrimage, where nonperformance of a requisite does not invalidate the pilgrimage, but necessitates an expiation by slaughtering. For any conditions necessary for its validity and all of its integrals (rukn, pl. arkan) are obligatory, since it is unlawful to intentionally perform an invalid act of worship.)

c2.2 The sunna (n: or recommended (mandub)) is that which the Lawgiver asks be done, but does not strictly require it. Someone who performs it out of obedience to Allah is rewarded, though someone who refrains from it is not punished.

c2.3 The permissible (mubah) is what the Lawgiver has neither requested nor prohibited, so the person who does it is not rewarded or punished. Rather, doing or not doing it are equal, though if a person does it to enable him to perform an act of obedience to Allah, or refrains from it for that reason, than he is rewarded for it. And if he does such an act to enable him to perform an act of disobedience, he is sinning.

c2.4 The offensive (makruh) is that which the Lawgiver has interdicted but not strictly forbidden. A person who refrains from such an act out of obedience to Allah is rewarded, while the person who commits it does not deserve to be punished.

c2.5 The unlawful (haram) is what the Lawgiver strictly forbids. Someone who commits an unlawful act deserves punishment, while one who refrains from it out of obedience to the command of Allah is rewarded. (n: Scholars distinguish between three levels of the unlawful:

(1) minor sins (saghira, pl. sagha'ir), which may be forgiven from prayer to prayer, from one Friday prayer (jumu'a) to another, and so forth, as in mentioned in hadith;

(2) enormities (kabira, pl. kaba'ir), those which appear by name in the Koran or hadith as the subject of an explicit threat, prescribed legal penalty, or curse, as listed below at book p;

(3) and unbelief (kufr), sins which put one beyond the pale of Islam (as discussed at o8.7) and necessitate stating the Testification of Faith (Shahada) to reenter it.

Repentance (def: p77) is obligatory for all three (al-Zawajir 'an iqtiraf al-kaba'ir (y49), 1.5-9).)