وَيَحْلِفُونَ بِاللّهِ إِنَّهُمْ لَمِنكُمْ وَمَا هُم مِّنكُمْ وَلَـكِنَّهُمْ قَوْمٌ يَفْرَقُونَ
[9:56]
And they swear by Allah that they are most surely of you, and they are not of you, but they are a people who are afraid (of you).
They swear by Allah that they are indeed of you; but they are not of you: yet they are afraid (to appear in their true colours).
And they swear by Allah that they are in truth of you, when they are not of you, but they are folk who are afraid.