''Nass'' ( ar, نَصّ, naṣṣ) is an

Arabic Arabic (, ' ; , ' or ) is a Semitic language spoken primarily across the Arab world.Semitic languages: an international handbook / edited by Stefan Weninger; in collaboration with Geoffrey Khan, Michael P. Streck, Janet C. E.Watson; Walter ...

word variously translated as "a known, clear legal injunction," a "divine decree", a "designation", "written law" as opposed to unwritten law, "canonical text" that forbids or requires, a "textual proof". In Shiah Islam (

Twelver Twelver Shīʿīsm ( ar, ٱثْنَا عَشَرِيَّة; '), also known as Imāmīyyah ( ar, إِمَامِيَّة), is the largest branch of Shīʿa Islam, comprising about 85 percent of all Shīʿa Muslims. The term ''Twelver'' refers t ...

and

Isma'ili Isma'ilism ( ar, الإسماعيلية, al-ʾIsmāʿīlīyah) is a branch or sub-sect of Shia Islam. The Isma'ili () get their name from their acceptance of Imam Isma'il ibn Jafar as the appointed spiritual successor ( imām) to Ja'far al- ...

), ''nass'' refers specifically to the designation of an infallible

Imam Imam (; ar, إمام '; plural: ') is an Islamic leadership position. For Sunni Muslims, Imam is most commonly used as the title of a worship leader of a mosque. In this context, imams may lead Islamic worship services, lead prayers, serve ...

by a previous infallible Imam.

References

Twelver theology Islamic terminology Ismailism {{shia-stub fa:نص