Qur'an 9:56 · At-Tawba

وَيَحْلِفُونَ بِٱللَّهِ إِنَّهُمْ لَمِنكُمْ وَمَا هُم مِّنكُمْ وَلَٰكِنَّهُمْ قَوْمٌۭ يَفْرَقُونَ

(56) And they swear by Allāh that they are from among you while they are not from among you; but they are a people who are afraid.