At Tawbah, 56 Ayah
9:56
وَيَحۡلِفُونَ بِٱللَّهِ إِنَّهُمۡ لَمِنكُمۡ وَمَا هُم مِّنكُمۡ وَلَٰكِنَّهُمۡ قَوۡمٞ يَفۡرَقُونَ ٥٦
Wa Yaĥlifūna Bil-Lahi 'Innahum Laminkum Wa Mā Hum Minkum Wa Lakinnahum Qawmun Yafraqūna
And they swear by Allah that they are from among you while they are not from among you; but they are a people who are afraid.