Quran 3:119 from Surah Aal-i-Imraan on Divine Marvels.
هَٰٓأَنتُمۡ أُوْلَآءِ تُحِبُّونَهُمۡ وَلَا يُحِبُّونَكُمۡ وَتُؤۡمِنُونَ بِٱلۡكِتَٰبِ كُلِّهِۦ وَإِذَا لَقُوكُمۡ قَالُوٓاْ ءَامَنَّا وَإِذَا خَلَوۡاْ عَضُّواْ عَلَيۡكُمُ ٱلۡأَنَامِلَ مِنَ ٱلۡغَيۡظِۚ قُلۡ مُوتُواْ بِغَيۡظِكُمۡۗ إِنَّ ٱللَّهَ عَلِيمُۢ بِذَاتِ ٱلصُّدُورِ
English translation: Lo! You are those you love them but not they love you and you believe in the Book all of it And when they meet you they say We believe And when they are alone they bite at you the finger tips (out) of [the] rage Say Die in your rage Indeed Allah (is) All-Knowing of what (is in) the breasts
Transliteration: haantum ulai tuhibbunahum wala yuhibbunakum watu'minuna bil-kitabi kullihi wa-idha laqukum qalu amanna wa-idha khalaw addu alaykumu al-anamila mina al-ghayzi qul mutu bighayzikum inna al-laha alimun bidhati al-suduri