The word(s) "know-" appears 2 time(s) in 2 verse(s) in Quran in Muhammad Habib Shakir translation.

(1) And We did not send before you any but men to whom We sent revelation-- so ask the followers of the Reminder if you do not know--

(سورة النحل, An-Nahl, Chapter #16, Verse #43)
(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)

(2) Then set your face upright for religion in the right state-- the nature made by Allah in which He has made men; there is no altering of Allah's creation; that is the right religion, but most people do not know--

(سورة الروم, Ar-Room, Chapter #30, Verse #30)
(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)