An-Nur · 24:19

19. Those who love for immoral acts to spread amongst the believers, one of them being to accuse of adultery, for them is a painful punishment in the world, by the fixed punishment of slander being executed upon them, and for them is the fire of Hell in the Hearafter. Allah knows their lies and the outcome of His servants’ matter, and He knows what is best for them and you do not know that.