Quran 24:12 — Light (Al-Noor)

لَولا إِذ سَمِعتُموهُ ظَنَّ المُؤمِنونَ وَالمُؤمِنٰتُ بِأَنفُسِهِم خَيرًا وَقالوا هٰذا إِفكٌ مُبينٌ

When you heard it, the believing men and the believing women should have had better thoughts about themselves, and should have said, "This is obviously a big lie."

[24:11] A gang among you produced a big lie.* Do not think that it was bad for you; instead, it was good for you. Meanwhile, each one of them has earned his share of the guilt. As for the one who initiated the whole incident, he has incurred a terrible retribution.

[24:13] Only if they produced four witnesses (you may believe them). If they fail to produce the witnesses, then they are, according to GOD, liars.