Bulugh al-Maram, Book 16, Hadith 1553 (English)

Anas (RAA) narrated that the Messenger of Allah said: “Blessed is he who is preoccupied with his defects rather than those of other people.” Related by Al-Bazzar with a good chain of narrators.

وَعَنْ أَنَسٍ ‏- رضى الله عنه ‏- قَالَ: قَالَ رَسُولُ اَللَّهِ ‏- صلى الله عليه وسلم ‏-{ طُوبَى لِمَنْ شَغَلَهُ عَيْبَهُ عَنْ عُيُوبِ اَلنَّاسِ } أَخْرَجَهُ اَلْبَزَّارُ بِإِسْنَادٍ حَسَنٍ.‏ (1972)‏.‏ ‏2 ‏- ضعيف جدا وله شواهد، ولكنها كلها ضعيفة ‏-أيضا‏- كما قال الحافظ العراقي.‏

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also referenced under: Book 16, Hadith 1510 (In-Book)