Chapter on the Virtue of Mosques and Prayer Within Them, and the Virtue of Congregational Prayer and Its Rulings

Muhammad ibn al-Hasan said: “This report is to be understood in the context of taqiyyah (dissimulation), and it is possible that what Imam عليه السلام meant was: ‘do not recite in a manner that is aloud, as the imam (of prayer) recites aloud, but rather it is permissible for him to recite silently to himself’.”