Riyad as-Salihin, Book 18, Hadith 1538 (In-Book) ⓘ
Ibn Mas'ud (May Allah be pleased with him) said: The Prophet said, "Shall I tell you what 'Al-'Adhu' (falsehood and slandering) is? It is calumny which is committed among the people."[Muslim].
وعن ابن مسعود رضي الله عنه أن النبي صلى الله عليه وسلم قال: “ ألا أنبئكم ما العِضَه؟ هي النميمة، القالة بين الناس" ((رواه مسلم)).