Analysis of information sources in references of the Wikipedia article "Masjid jami" in Indonesian language version.
Jāmiʿ is a designation for the congregational mosque dedicated to Friday communal prayer; in modern times it is used interchangeably with masjid.
All schools but the Ḥanbalīs require that Friday prayers be held in a physical edifice; the Ḥanbalīs hold that they can be performed in a tent or in the open country. The schools of law differ on the number of participants required to constitute a valid congregation for Friday prayers: the Shāfiʿīs and Ḥanbalīs require forty, the Mālikīs twelve, and the Ḥanafīs only two or three praying behind the imām (in each case, counting only persons obligated to perform the prayer). Such limitations had significant practical repercussions, as when the Ḥanafī authorities of Bukhārā prevented the performance of Friday congregational prayers at a congregational mosque (jāmiʿ) erected in a substantial community in the region in the fifth/eleventh century and ultimately razed the building (Wheatley, 235). Shāfiʿīs further required that Friday prayers be held at only one place in each settlement. Until the fourth/tenth century, the number of Friday mosques (designated congregational mosques with a pulpit) was severely limited, even in major metropolitan centres; in later centuries, Friday mosques proliferated to accommodate the needs of urban populations (Wheatley, 234–5).