Quran 3:166 from Surah Aal-i-Imraan on Divine Marvels.
وَمَآ أَصَٰبَكُمۡ يَوۡمَ ٱلۡتَقَى ٱلۡجَمۡعَانِ فَبِإِذۡنِ ٱللَّهِ وَلِيَعۡلَمَ ٱلۡمُؤۡمِنِينَ
English translation: And what struck you (on the) day (when) met the two hosts by (the) permission (of) Allah and that He (might) make evident the believers
Transliteration: wama asabakum yawma al-taqa al-jam'ani fabi-idh'ni al-lahi waliya'lama al-mu'minina