Al-Mujadila 58:8

Alam tara ila allatheena nuhooAAani annajwa thumma yaAAoodoona lima nuhooAAanhu wayatanajawna bil-ithmi walAAudwaniwamaAAsiyati arrasooli wa-itha jaookahayyawka bima lam yuhayyika bihi Allahuwayaqooloona fee anfusihim lawla yuAAaththibunaAllahu bima naqoolu hasbuhum jahannamu yaslawnahafabi/sa almaseer

Have you not considered those who were forbidden from private conversation [i.e., ridicule and conspiracy] and then 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 Allāh does not greet you and say among themselves, "Why does Allāh not punish us for what we say?" Sufficient for them is Hell, which they will [enter to] burn, and wretched is the destination.

Did you not see those who were forbidden from holding secret talks; then they do again what they were forbidden to do? They whisper for sinful act and wrongdoing and disobedience of the prophet, and when they come to you, they greet you the way Allah does not greet you, and say to themselves, “Why does Allah not punish us for what we say?” Enough for them is Jahannam (Hell); they will enter it, and it is an evil end.