Nahj al-Balagha Hadith n. 35

Selections from The Sayings and Preaching of Amir al-Muminin Ali ibn Abi Talib (Peace Be Upon Him) Including His Replies to Questions and Maxims Expressed for Various Purposes.
Translated by Sayyid Ali Reza

وَقَالَ (عليه‏ السلام):

Amir al-mu'minin, peace be upon him, said:

مَنْ أَسْرَعَ إِلَى النَّاسِ بِمَا يَكْرَهُونَ،

If someone is quick in saying about people what they dislike,

قَالُوا فِيهِ [بـ] ما لاَ يَعْلَمُونَ.

they speak about him that about which they have no knowledge.