Chapter on the Manner of Prayer, Explanation of the Fifty-One Rak‘ahs; The Order, Recitation, Tasbih in Bowing and Prostration, Qunut, and What is Obligatory and Recommended Therein

His (peace be upon him) avoidance of answering what the questioner directly asked is an indication of the dislike (‘karahah’) of this phrase (‘Amin’), and He عليه السلام was not able to explicitly declare its dislike due to ‘taqiyyah’ (precautionary dissimulation) and necessity, so He عليه السلام entirely refrained from answering the question.