Quran 56:23 from Surah Al-Waaqia on Divine Marvels.
كَأَمۡثَٰلِ ٱللُّؤۡلُوِٕ ٱلۡمَكۡنُونِ
English translation: Like pearls well-protected
Transliteration: ka-amthali al-u'lu-i al-maknuni