Quran 59:12 from Surah Al-Hashr on Divine Marvels.
لَئِنۡ أُخۡرِجُواْ لَا يَخۡرُجُونَ مَعَهُمۡ وَلَئِن قُوتِلُواْ لَا يَنصُرُونَهُمۡ وَلَئِن نَّصَرُوهُمۡ لَيُوَلُّنَّ ٱلۡأَدۡبَٰرَ ثُمَّ لَا يُنصَرُونَ
English translation: If they are expelled not they will leave with them and if they are fought not they will help them And if they help them certainly they will turn (their) backs; then not they will be helped
Transliteration: la-in ukh'riju la yakhrujuna ma'ahum wala-in qutilu la yansurunahum wala-in nasaruhum layuwallunna al-adbara thumma la yunsaruna