كتاب الجامع
16  
The Comprehensive Book
Bulugh al-Maram 1517
Anas (RAA) narrated that the Messenger of Allah (ﷺ) said:
“The atonement of backbiting a man is to ask Allah to forgive him.” Related by Al-Harith bin Abu Usamah with a weak chain of narrators.
وَعَنْ أَنَسٍ ‏- رضى الله عنه ‏- عَنْ اَلنَّبِيِّ ‏- صلى الله عليه وسلم ‏-قَالَ: { كَفَّارَةٌ مَنْ اِغْتَبْتَهُ أَنْ تَسْتَغْفِرَ لَهُ } رَوَاهُ اَلْحَارِثُ بْنُ أَبِي أُسَامَةَ بِسَنَدٍ ضَعِيفٍ.‏ 1‏ .‏
Reference : Bulugh al-Maram 1517
In-book reference : Book 16, Hadith 1517
English translation : Book 16, Hadith 1560
Hadith Text
Reference