Armenian polemical literature with Muslims from the early modern Ottoman context is very scarce. Unlike in Safavid Persia, public debates were not encouraged in the Ottoman Empire. Official polemical treatises from the Armenian milieu are lacking; little has survived in the historiographies, neo-martyrological accounts, and poetry about how Miaphysite (non-Chalcedonian) Apostolic Armenians positioned themselves within the cohabitation system of Ottoman society. Even less has survived in Armenian sources about popular Muslim religious practices. Therefore, a brief account of this matter provided by the 17th c. Armenian Constantinopolitan historiographer Eremia Kʻēōmiwrchean acquires great importance. The present article aims to explore the information provided by Eremia on popular Muslim religious practices, not only because it is a rare material preserved in the Armenian sources but, most importantly, because it reveals the topics of religious debates between Christians and Ottoman Muslims in everyday life.