The ruling on congregational prayer without adhan and iqamah

Question:
The issue of gathering: praying the Thursday congregation without adhan is not haram.

Answer:
There is no harm; their prayer is valid. However, if they perform the adhan and iqamah, that is the prescribed practice. The adhan and iqamah are a recommended practice (sunnah) for those who missed the prayer, whereas in the town, it is obligatory (fard). It is necessary that the adhan be called in the town and the prayer be established in the town, even if only one person is present in the town; in that case, it becomes a recommended practice (sunnah) for the rest. As for if the people of the town all leave off the adhan and iqamah, they are to be compelled to do so, and they are obligated to do so, even if this leads to fighting them. If it leads to their rebellion, the imam fights them until they call the adhan and obey, because this is a prominent symbol among the symbols of Islam, and it is not permissible to leave it off at all.