Qatadah said regarding this statement of Allah Almighty: (Allah Almighty says:) "Why, when you heard it," that you should have denied it and said that this is a clear lie. By my life, when you hear something evil about your brother, declaring it false is better for you and safer than spreading it, publicising it and believing it.
Tabarani recorded it, and its chain is jayyid (good).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب التفسير / 11199
Hadith Gradingمحدثین:إسنادہ جید۔
Hadith Takhrij«اخرجه الطبراني فى المعجم الكبير (139/23)»