So it is to be interpreted as referring to a situation of ‘taqiyyah’ (dissimulation), because in a state of ‘taqiyyah’ it is permissible to recite it silently. It is also possible that the Imam عليه السلام, peace be upon him, intended someone who did not recite ‘Bismillah Hir Rahman Nir Rahim’ out of forgetfulness, for the one who forgets that does not incur harm and is not required to repeat the prayer, and we will clarify this later. What indicates that during ‘taqiyyah’ it is permissible not to recite it aloud is what has been narrated:
Commentary #2