5. According to the Hanafi muzhab, every person reading Salaah (whether he is an Imam, follower or alone; or whether the namaaz is audible (Jahri) or silent (Sirri)) must say “Aameen” silently:
I. Hadrat Abu Hurairah رضی اللہ تعالٰی عنہ states that the Holy Prophetصلی اللہ علیہ وسلم once said, “When the lmam says “Aarneen”, you say it too, because whoever’s Aameen conforms to the Aameen of the angels will have his previous sins forgiven.” 33.20 – Bukhari, Muslim, Ahmad, Maalik, Abu Dawood, Tirmidhi, Nasaa’i, Ibn Majah
This Hadith establishes that the previous sins of he whose “Aameen” corresponds to the “Aameen” of the angels arc forgiven, and it is apparent that the angels say “Aameen” silently, since no one has heard it until today. Thus, we should also say “Aameen” softly.
2. Hadrat Waa’il ibn Hajar رضی اللہ تعالٰی عنہ states, “I performed Salaah behind the Holy Prophetصلی اللہ علیہ وسلم .When he reached “… walad-Daaleen”, he. said “Aameen” while keeping his voice soft.” 33.21 – Ahmed, Abu Dawood Tayaalsi, Abu Ya ‘laa. Daar-Qutni, Mustatlrak