At-Taubah - 9:47

لَوْ خَرَجُواْ فِيكُم مَّا زَادُوكُمْ إِلاَّ خَبَالاً ولأَوْضَعُواْ خِلاَلَكُمْ يَبْغُونَكُمُ الْفِتْنَةَ وَفِيكُمْ سَمَّاعُونَ لَهُمْ وَاللّهُ عَلِيمٌ بِالظَّالِمِينَ
[9:47]
Had they gone forth with you, they would not have added to you aught save corruption, and they would certainly have hurried about among you seeking (to sow) dissension among you, and among you there are those who hearken for their sake; and Allah knows the unjust.
If they had come out with you, they would not have added to your (strength) but only (made for) disorder, hurrying to and fro in your midst and sowing sedition among you, and there would have been some among you who would have listened to them. But Allah knoweth well those who do wrong.
Had they gone forth among you they had added to you naught save trouble and had hurried to and fro among you, seeking to cause sedition among you; and among you there are some who would have listened to them. Allah is Aware of evil-doers.