Translation of the verse 7 from Surah Ta-Ha : Number of verses 135 - - page 312 - Part 16.
And if you (O Muhammad SAW) speak (the invocation) aloud, then verily, He knows the secret and that which is yet more hidden.
And if you speak aloud - then indeed, He knows the secret and what is [even] more hidden.
(20:7) Whether you utter your supplication in a loud voice (it makes no difference) for He hears not only what is said in a low voice but also what is kept most secret. *3
*3) That 'is, "You need not complain to Allah in a loud voice against the persecution from which you and your companions are suffering and the mischievous machinations your enemies are devising to defeat you for Allah is fully aware of all those things, and He hears even the complaints you cherish in your hearts."