Quran 48:25

هُمُ ٱلَّذِينَ كَفَرُواْ وَصَدُّوڪُمۡ عَنِ ٱلۡمَسۡجِدِ ٱلۡحَرَامِ وَٱلۡهَدۡىَ مَعۡكُوفًا أَن يَبۡلُغَ مَحِلَّهُ ۥ‌ۚ وَلَوۡلَا رِجَالٌ۬ مُّؤۡمِنُونَ وَنِسَآءٌ۬ مُّؤۡمِنَـٰتٌ۬ لَّمۡ تَعۡلَمُوهُمۡ أَن تَطَـُٔوهُمۡ فَتُصِيبَكُم مِّنۡهُم مَّعَرَّةُۢ بِغَيۡرِ عِلۡمٍ۬‌ۖ لِّيُدۡخِلَ ٱللَّهُ فِى رَحۡمَتِهِۦ مَن يَشَآءُ‌ۚ لَوۡ تَزَيَّلُواْ لَعَذَّبۡنَا ٱلَّذِينَ كَفَرُواْ مِنۡهُمۡ عَذَابًا أَلِيمًا ٢٥

It is they who disbelieved and barred you from the Sacred Masjid, and even prevented your offerings from reaching their destination. There were believing men and women (within the enemy camp) whom you did not know, and you were about to hurt them, unknowingly. ALLAH thus admits into His mercy whomever He wills. If they persist, He will requite those among them who disbelieve with a painful retribution.