AN NISAA' — Ayat 104

وَلاَ تَهِنُواْ فِي ابْتِغَاء الْقَوْمِ إِن تَكُونُواْ تَأْلَمُونَ فَإِنَّهُمْ يَأْلَمُونَ كَمَا تَأْلَمونَ وَتَرْجُونَ مِنَ اللّهِ مَا لاَ يَرْجُونَ وَكَانَ اللّهُ عَلِيمًا حَكِيمًا

And do not weaken in pursuit of the enemy. If you should be suffering - so are they suffering as you are suffering, but you expect from Allah that which they expect not. And Allah is ever Knowing and Wise.