Volume 9, Book 93, Number 637:
Narrated Ibn ‘Abbas:
The Prophet was hiding himself in Mecca and used to recite the (Qur’an) in a loud voice. When
the pagans heard him they would abuse the Qur’an and the one who brought it, so Allah said to His
Prophet: ‘Neither say your prayer aloud, nor say it in a low tone.’ (17.110)