Hawzah News Agency – Imam al-Sadiq peace be upon him says:

أحَبُّ إخواني إلَيَّ مَن أهدى‏ إلَيَّ عُيوبي.

‘The most beloved of my brothers to me is he who confers my faults to me.’

Source: Tuhaf al-Uqul, no. 366