Al-Mujaadila 58:8

Have you not seen those who were forbidden from holding secret talks, yet they go back to do what they were forbidden from, conspiring in sin and aggression, and in disobedience to the Messenger? When they come to you, they greet you[5] other than the way Allah greets you, and they say to one another, “Why does Allah not punish us for what we say?” Sufficient is Hell for them; they will enter it. What a terrible destination!

[5] This is referring to the Jews who used to play with words while addressing the Prophet (ﷺ) to ridicule him, saying "Asāmu ‘alaikum" (death be upon you) instead of "Asalamu ‘alaikum" (peace be upon you).

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[1643] 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.

[1643] This is in reference to the Jews who would greet the Muslims with the words "Death be upon you," rather than "Peace."

8. Have you not seen those who were forbidden to hold secret counsels, and afterwards returned to that which they had been forbidden, and conspired together for sin and wrong doing and disobedience to the Messenger (Muhammad صلى الله عليه وسلم). And when they come to you, they greet you with a greeting wherewith Allâh greets you not, and say within themselves: "Why should Allâh punish us not for what we say?" Hell will be sufficient for them; they will burn therein. And worst indeed is that destination!

Hast thou not observed those who were forbidden conspiracy and afterward returned to that which they had been forbidden, and (now) conspire together for crime and wrongdoing and disobedience toward the messenger? And when they come unto thee they greet thee with a greeting wherewith Allah greeteth thee not, and say within themselves: Why should Allah punish us for what we say? Hell will suffice them; they will feel the heat thereof - a hapless journey's end!