Al-Mujadila 58:8

أَلَمۡ تَرَ إِلَى ٱلَّذِينَ نُهُواْ عَنِ ٱلنَّجۡوَىٰ ثُمَّ يَعُودُونَ لِمَا نُهُواْ عَنۡهُ وَيَتَنَٰجَوۡنَ بِٱلۡإِثۡمِ وَٱلۡعُدۡوَٰنِ وَمَعۡصِيَتِ ٱلرَّسُولِۖ وَإِذَا جَآءُوكَ حَيَّوۡكَ بِمَا لَمۡ يُحَيِّكَ بِهِ ٱللَّهُ وَيَقُولُونَ فِيٓ أَنفُسِهِمۡ لَوۡلَا يُعَذِّبُنَا ٱللَّهُ بِمَا نَقُولُۚ حَسۡبُهُمۡ جَهَنَّمُ يَصۡلَوۡنَهَاۖ فَبِئۡسَ ٱلۡمَصِيرُ 8

Have you not considered those who were forbidden from private conversation, then they return to that which they were forbidden and converse among themselves about sin and aggression and disobedience to the Messenger? And when they come to you, they greet you with that [word] by which Allah does not greet you and say among themselves, "Why does Allah not punish us for what we say?" Sufficient for them is Hell, which they will [enter to] burn, and wretched is the destination