Surah Aali Imran (The Family of Imran), Verse 167

وَلِیَعْلَمَ الَّذِیْنَ نَافَقُوْا وَقِیْلَ لَهُمْ تَعَالَوْا قَاتِلُوْا فِیْ سَبِیْلِ اللّٰهِ اَوِ ادْفَعُوْا قَالُوْا لَوْ نَعْلَمُ قِتَالًا لَّاتَّبَعْنٰكُمْ هُمْ لِلْكُفْرِ یَوْمَىِٕذٍ اَقْرَبُ مِنْهُمْ لِلْاِیْمَانِ یَقُوْلُوْنَ بِاَفْوَاهِهِمْ مَّا لَیْسَ فِیْ قُلُوْبِهِمْ وَاللّٰهُ اَعْلَمُ بِمَا یَكْتُمُوْنَ ۟

Wa liya'lamal lazeena naafaqoo; wa qeela lahum ta'aalaw qaatiloo fee sabeelil laahi awid fa'oo qaaloo law na'lamu qitaalallat taba'naakum; hum lilkufri yawma'izin aqrabu minhum lil eemaan; yaqooloona bi afwaahihim maa laisa fee quloobihim; wallaahu a'lamu bimaa yaktumoon

“And the Hypocrites also. These were told: "Come, fight in the way of Allah, or (at least) drive (The foe from your city)." They said: "Had we known how to fight, we should certainly have followed you." They were that day nearer to Unbelief than to Faith, saying with their lips what was not in their hearts but Allah hath full knowledge of all they conceal.”

Quran 3:167 (Yusuf Ali Translation)