Abu Amr said:

If you heard someone slandering or speaking ill of another, then know that he is saying: “I am better than him” [1].


[1] Jamii’ Bayan Al-Ilm wa Fadlih 2/36, and his saying: (I am better than him) is in reference to the words of Iblees [about Adam (Alaihi as-Salam)], so whoever falls into such a matter is following the footsteps of Iblees.

قال أبو عمرو: إذا سمعت أحدا يقع في غيره فاعلم أنه إنما يقول: أنا خير منه