Quran 27:74 from Surah An-Naml on Divine Marvels.
وَإِنَّ رَبَّكَ لَيَعۡلَمُ مَا تُكِنُّ صُدُورُهُمۡ وَمَا يُعۡلِنُونَ
English translation: And indeed your Lord surely knows what conceals their breasts and what they declare
Transliteration: wa-inna rabbaka laya'lamu ma tukinnu suduruhum wama yu'linuna