Hawzah News Agency – The commander of the faithful Imam Ali peace be upon him says:  

طوبى‏ لِمَن شَغَلَهُ عَيبُهُ عَن عُيوبِ النّاسِ.

‘Blessed be the one whose own fault preoccupies him from finding faults in others.’

Source: Nahj al-Balagha, Sermon 176