Maslaha or maslahah (مصلحة‎‎, "public interest") is a concept in traditional Islamic law. Maslaha is not Shari'a, but it is a concept that belongs to Islamic jurisprudence (also known as fiqh). It is one of the secondary sources in Islamic jurisprudence used by some "madhhab" to interpret Shari'a (the general principles present in the Qur'an and the Sunnah) in order to set rules. It is invoked to prohibit or allow something on the basis of whether it serves the common good or public welfare.