Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
quran:24:12 –

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

Why, when you ˹first˺ heard about it, did the believing men and women not think good of themselves, that is, ˹why did˺ some ˹not˺ think good of others, and say, ‘This is a manifest calumny?’, ˹this is˺ a patent lie? (there is a shift here in the address from the second to the third person), in other words, ˹why did˺ you ˹not˺ assume ˹good of them˺, O band ˹of believers˺ and say:
القرآن:٢٤:١٢ –

لَوْلَا إِذْ سَمِعْتُمُوهُ ظَنَّ الْمُؤْمِنُونَ وَالْمُؤْمِنَاتُ بِأَنْفُسِهِمْ خَيْرًا وَقَالُوا هَٰذَا إِفْكٌ مُبِينٌ  

{لولا} هلا {إذ} حين {سمعتموه ظن المؤمنين والمؤمنات بأنفسهم} أي بعضهم ببعض {خيرا وقالوا هذا إفك مبين} كذب بيِّن، فيه التفات عن الخطاب أي ظننتم أيها العصبة وقلتم.