The word(s) "voices" appears 4 time(s) in 4 verse(s) in Quran in Muhammad Pickthal translation.

(1) On that day they follow the summoner who deceiveth not, and voices are hushed for the Beneficent, and thou hearest but a faint murmur.

(سورة طه, Taa-Haa, Chapter #20, Verse #108)
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(2) Be modest in thy bearing and subdue thy voice. Lo! the harshest of all voices is the voice of the ass.

(سورة لقمان, Luqman, Chapter #31, Verse #19)
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(3) O ye who believe! Lift not up your voices above the voice of the Prophet, nor shout when speaking to him as ye shout one to another, lest your works be rendered vain while ye perceive not.

(سورة الحجرات, Al-Hujuraat, Chapter #49, Verse #2)
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(4) Lo! they who subdue their voices in the presence of the messenger of Allah, those are they whose hearts Allah hath proven unto righteousness. Theirs will be forgiveness and immense reward.

(سورة الحجرات, Al-Hujuraat, Chapter #49, Verse #3)
(Arabic, Transliteration, Urdu (Ahmed Ali), Urdu (Jalandhry), Farsi, Yusuf Ali, Shakir, Picthal, Mohsin Khan, French, Spanish, Indonesian, Malay, German, Bosnian, Russian, Dutch, Italian, Portuguese, Tafsir - Jalal ad-Din, Tafsir - King Fahad Quran Complex)