Quran 8:19 from Surah Al-Anfaal on Divine Marvels.
إِن تَسۡتَفۡتِحُواْ فَقَدۡ جَآءَكُمُ ٱلۡفَتۡحُۖ وَإِن تَنتَهُواْ فَهُوَ خَيۡرٞ لَّكُمۡۖ وَإِن تَعُودُواْ نَعُدۡ وَلَن تُغۡنِيَ عَنكُمۡ فِئَتُكُمۡ شَيۡـٔٗا وَلَوۡ كَثُرَتۡ وَأَنَّ ٱللَّهَ مَعَ ٱلۡمُؤۡمِنِينَ
English translation: If you ask for victory then certainly has come to you the victory And if you desist then it (is) good for you but if you return We will return (too) And never will avail you your forces anything even if (they are) numerous And that Allah (is) with the believers
Transliteration: in tastaftihu faqad jaakumu al-fathu wa-in tantahu fahuwa khayrun lakum wa-in ta'udu na'ud walan tugh'niya ankum fi-atukum shayan walaw kathurat wa-anna al-laha ma'a al-mu'minina