The Neglected Sunnah of Reciting the Qur’aan and Adhkaar in Salaah

Imaam an-Nawawee said, “… As for other than the Imaam, the Sunnah is to say the takbeer in a low voice regardless of whether the worshipper is following an Imaam or praying alone. The minimum level of the low voice is that he should be able to hear himself provided he has a good hearing faculty and does not suffer from any hearing problems. This ruling is general with regard to reciting the Qur’aan, takbeer, tasbeeh in rukoo’, tashahhud, tasleem and du’aa whether in obligatory or voluntary prayer. Nothing will be rewarded in all of these acts unless the worshipper recites them in a low manner that he can hear himself.

Source: al-Majmoo’ (3/295) in al-Qawlul-Mubeen fee Akhtaa’ al-Musalleen, p. 99 by Shaykh Mashhoor Hasan Salmaan