An-Nur 24:12

لَّوْلَآ إِذْ سَمِعْتُمُوهُ ظَنَّ ٱلْمُؤْمِنُونَ وَٱلْمُؤْمِنَـٰتُ بِأَنفُسِهِمْ خَيْرًا وَقَالُوا۟ هَـٰذَآ إِفْكٌ مُّبِينٌ

Lawlā idh samiʿ'tumūhu ẓanna l-mu'minūna wal-mu'minātu bi-anfusihim khayran waqālū hādhā if'kun mubīnun

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"?