At Tawbah Ayah 56
وَيَحْلِفُونَ بِٱللَّهِ إِنَّهُمْ لَمِنكُمْ وَمَا هُم مِّنكُمْ وَلَـٰكِنَّهُمْ قَوْمٌ يَفْرَقُونَ ٥٦
They swear by Allah that they are part of you, but they are not. They only say so out of fear.
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