Quran 3:167 from Surah Aal-i-Imraan on Divine Marvels.
وَلِيَعۡلَمَ ٱلَّذِينَ نَافَقُواْۚ وَقِيلَ لَهُمۡ تَعَالَوۡاْ قَٰتِلُواْ فِي سَبِيلِ ٱللَّهِ أَوِ ٱدۡفَعُواْۖ قَالُواْ لَوۡ نَعۡلَمُ قِتَالٗا لَّٱتَّبَعۡنَٰكُمۡۗ هُمۡ لِلۡكُفۡرِ يَوۡمَئِذٍ أَقۡرَبُ مِنۡهُمۡ لِلۡإِيمَٰنِۚ يَقُولُونَ بِأَفۡوَٰهِهِم مَّا لَيۡسَ فِي قُلُوبِهِمۡۚ وَٱللَّهُ أَعۡلَمُ بِمَا يَكۡتُمُونَ
English translation: And that He (might) make evident those who (are) hypocrites And it was said to them Come fight in (the) way (of) Allah or defend They said If we knew fighting certainly we (would have) followed you They to disbelief that day (were) nearer than [them] to the faith saying with their mouths what was not in their hearts And Allah (is) Most Knowing (of) what they conceal
Transliteration: waliya'lama alladhina nafaqu waqila lahum ta'alaw qatilu fi sabili al-lahi awi id'fa'u qalu law na'lamu qitalan la-ittaba'nakum hum lil'kuf'ri yawma-idhin aqrabu min'hum lil'imani yaquluna bi-afwahihim ma laysa fi qulubihim wal-lahu a'lamu bima yaktumuna