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
When you heard the lie, why did believing men and women not think well of their own people and declare, ‘This is obviously a lie’?
Why then, did not the believers, men and women, when you heard it (the slander), think good of their own people and say: "This (charge) is an obvious lie?"