Dr. Mustafa Khattab, the Clear Quran - Surah At-Tawbah, ayah 56

Translation of Surah At-Tawbah, ayah 56 (9:56)

وَيَحۡلِفُونَ بِٱللَّهِ إِنَّهُمۡ لَمِنكُمۡ وَمَا هُم مِّنكُمۡ وَلَٰكِنَّهُمۡ قَوۡمٞ يَفۡرَقُونَ ٥٦
They swear by Allah that they are part of you, but they are not. They only say so out of fear.