Surah An-Nur, ayah 47

24:47

وَيَقُولُونَ ءَامَنَّا بِٱللَّهِ وَبِٱلرَّسُولِ وَأَطَعۡنَا ثُمَّ يَتَوَلَّىٰ فَرِيقٞ مِّنۡهُم مِّنۢ بَعۡدِ ذَٰلِكَۚ وَمَآ أُوْلَٰٓئِكَ بِٱلۡمُؤۡمِنِينَ ٤٧

Wayaqūlūna āmannā billāhi wabir-rasūli wa ata'nā thumma yatawallā farīqum minhum mim ba'di dhālika wamā ulā'ika bil-mu'minīn

But they [i.e., the hypocrites] say, "We have believed in Allāh and in the Messenger, and we obey"; then a party of them turns away after that. And those are not believers.