Quran 58:8 — The Debate (Al-Mujaadalah)

Have you noted those who were enjoined from conspiring secretly, then insist on conspiring? They conspire to commit sin, transgression, and disobedience of the messenger. When they come to you, they greet you with a greeting other than that decreed by GOD. They say inside themselves, "GOD will not punish us for our utterances." Their only requital is Gehenna, wherein they burn; what a miserable destiny.

[58:7] Do you not realize that GOD knows everything in the heavens and everything on earth? No three people can conspire secretly without Him being their fourth, nor five without Him being the sixth, nor less than that, nor more, without Him being there with them wherever they may be. Then, on the Day of Resurrection, He will inform them of everything they had done. GOD is fully aware of all things.

[58:9] O you who believe, if you have to confer secretly, you shall not confer to commit sin, transgression, and to disobey the messenger. You shall confer to work righteousness and piety. You shall reverence GOD, before whom you will be summoned.