Ruling on saying Ta'min after the recitation of Surah other than Al-Fatihah

A: First, we should comment on what you said at the beginning of your letter when you counted the blessings that are here and mentioned Al-Haramayn Al-Sharifayn (the Two Sacred Mosques: the Sacred Mosque in Makkah and the Prophet's Mosque in Madinah) and what you called other sacred doorsteps. We do not have doorsteps that should be glorified, because this is an act of paganism, which should be rejected. It is, thus, obligatory to avoid using this term.Second, it is not permissible to raise one's voice on saying "Amen" except after reciting Surah Al-Fatihah in a Jahri Salah (Prayer recited out loud). It is permissible to say "Amen" inaudibly upon hearing other supplications from the Qur'an, but saying it aloud is a Bid`ah (innovation in religion), because the Prophet (peace be upon him) said: "Anyone who does something that we have not ordered (in worship) it will be rejected." The Prophet (peace be upon him) never used to say "Amen" aloud except after reciting Surah Al-Fatihah in a Jahri Salah. (Part No. 5; Page No. 354) May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.