Sa'id bin Jubayr said: "Why, when you heard it" [Surah An-Nur: 12], meaning the accusation, why did "you not say: It is not for us" [Surah An-Nur: 16], meaning it is not fitting for us, "to speak of this" [Surah An-Nur: 16], meaning the accusation, when our eyes have seen nothing; "Glory be to You" [Surah An-Nur: 12], meaning why did you not say: Glory be to You! "This is a tremendous slander" [Surah An-Nur: 16], meaning why did you not say what Sayyiduna Sa'd bin Mu'adh al-Ansari (may Allah be pleased with him) said? For when Sayyiduna Sa'd (may Allah be pleased with him) heard what was said about Sayyidah Aishah, he said: Glory be to You! This is a tremendous slander. And slander is when a person fabricates a lie against someone and says what never happened.
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 19508