Verš 20:7

A jestliže slova svá hlasitě pronášíš, (je to zbytečné), vždyť On zajisté zná tajemství, byť sebelépe bylo skryté;

Tafsir al-Jalalayn

And should you be loud in your speech, in remembrance [of God] or supplication, then God has no need for this to be [spoken] loud, then indeed He knows the secret and [that which is] yet more hidden, than that [secret], namely, that which the soul whispers [to itself] and that which occurs to the mind but which you do not speak of [to anyone], so do not strain yourself to be loud [in your speech].