Al-Mujadila 58:8 الم تر الى الذين نهوا عن النجوى ثم يعودون لما نهوا عنه ويتناجون بالاثم والعدوان ومعصيت الرسول واذا جاءوك حيوك بما لم يحيك به الله ويقولون في انفسهم لولا يعذبنا الله بما نقول حسبهم جهنم يصلونها فبيس المصير ٨

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 you¹ 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.