Full Sharh — Bulugh al-Maram 1693
وَعَنْ أَبِي هُرَيْرَةَ - رضى الله عنه - أَنَّ رَسُولَ اَللَّهِ - صلى الله عليه وسلم -قَالَ: { أَتَدْرُونَ مَا اَلْغِيبَةُ? قَالُوا: اَللَّهُ وَرَسُولُهُ أَعْلَمُ. قَالَ: ذِكْرُكَ أَخَاكَ بِمَا يَكْرَهُ. قِيلَ: أَرَأَيْتَ إِنْ كَانَ فِي أَخِي مَا أَقُولُ? قَالَ: إِنْ كَانَ فِيهِ مَا تَقُولُ فَقَدْ اِغْتَبْتَهُ, وَإِنْ لَمْ يَكُنْ فَقَدْ بَهَتَّهُ } أَخْرَجَهُ مُسْلِمٌ. 1 .1 - صحيح. رواه مسلم (2589).
English Translation
Abu Hurairah (RAA) narrated, ‘The Messenger of Allah (ﷺ) asked, “Do you know what backbiting is?” They replied, `Allah and His Messenger (ﷺ) know best.’ He said, “It is saying something about your brother which he dislikes.” Someone asked, ‘Supposing that what I said about my brother was true?’ and the Messenger of Allah (ﷺ) said:: “If what you say about him is true you have backbitten him and if it is not true you have slandered him.” Related by Muslim.
Source
Bulugh al-Maram(بلوغ المرام)
The Comprehensive Book
Hadith Number
1693