Ta-Ha - 20:7

وَإِن تَجْهَرْ بِالْقَوْلِ فَإِنَّهُ يَعْلَمُ السِّرَّ وَأَخْفَى
[20:7]
And if you utter the saying aloud, then surely He knows the secret, and what is yet more hidden.
If thou pronounce the word aloud, (it is no matter): for verily He knoweth what is secret and what is yet more hidden.
And if thou speakest aloud, then lo! He knoweth the secret (thought) and (that which is yet) more hidden.