Surah An-Nur, ayah 12

24:12

لَّوۡلَآ إِذۡ سَمِعۡتُمُوهُ ظَنَّ ٱلۡمُؤۡمِنُونَ وَٱلۡمُؤۡمِنَٰتُ بِأَنفُسِهِمۡ خَيۡرٗا وَقَالُواْ هَٰذَآ إِفۡكٞ مُّبِينٞ ١٢

Llawlā idh sami'tumūhu zannal-mu'minūna wal-mu'minātu bi anfusihim khayran waqālū hādhā ifkum mubīn

Why, when you heard it, did not the believing men and believing women think good of themselves [i.e., one another] and say, "This is an obvious falsehood"?