Etiquettes of the Houses of Allah
From the book:
The Masjid is distinctly celebrated for the observance of many of the great and beloved acts of good deeds, such as the plentiful Remembrances of Allāh, establishment of prayer, recitation of the Qur’ān, circles of knowledge and learning the religion of Allāh. On the contrary, the marketplace is fraught with unlawful transactions, bad deeds and other abominable acts that are habitual of marketplaces.
It's enough of an honor for the Masjid to be called the House of Allāh. Allāh attributed it to Himself in order to honor it, glorify its status and display its lofty standing.
“And the Mosques are for Allāh (Alone), so don't invoke anyone along with
Allah." [Sūrah al-Jinn 72:18]
“In Houses (Mosques), which Allāh has ordered to be raised (to be cleaned and
to be honored), in them His Name is glorified in the mornings and in the
afternoons or the evenings. Men whom neither trade nor sale diverts them from
the Remembrance of Allāh (with heart and tongue), nor from performing As-
Salāt (Iqāmat-as-Salāt). ” [Sūrah An-Nūr 24: 36-37]