The Holy Quran 20:7 — Surah Taha

Arabic text

وَإِن تَجْهَرْ بِٱلْقَوْلِ فَإِنَّهُۥ يَعْلَمُ ٱلسِّرَّ وَأَخْفَى

Translation

Even if you speak loudly, (it makes no difference to Him because) He knows what is whispered and all that is even more hidden (such as the unspoken thoughts of the heart).

Tafsir (excerpt) — Tafsir Usmani

The vastness of the knowledge of Allah: previously the all-encompassing nature of [His] power and control was described; in this verse the vastness of Allah's knowledge is mentioned. That is, how could a word spoken in a loud voice remain hidden from the Knower of the unseen, Who is aware of everything open and hidden, and even of what is more hidden than…

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