Cbstians follow a routine in which they are not only groomed academically; they are  enlightened religiously as well. The beautiful and spiritual mosque is on campus accommodating 500 boys .

Congregational Prayers are offered in the masjid and there is a prayer room in each house as well. Muslim boys attend maghrib and Jummah prayers in the congregation and are encouraged to offer all prayers. Dars-e-Quran is held in the school Mosque after Maghrib prayers. Arrangements for Sehri , Iftari and Taraweeh Prayers are made in the Holy month of ramazan every year.