Hawzah News Agency – Imam Hussain peace be upon him said to a man who was backbiting about a man in his presence,

يا هذا، كُفَّ عنِ الغِيبَةِ؛ فإنّها إدامُ كِلابِ النارِ.

 ‘Stop backbiting, for verily it is the food of the dogs of Hell.’

Source: Tuhaf al-Uqul, no. 245