Nahj al-Balagha Hadith n. 471

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:

لاَ خَيْرَ فِي الصَّمْتِ عَنِ الْحُكْمِ،

There is no good in silence over matters involving wisdom just

كَمَا أنَّهُ لاَ خَيْرَ فِي الْقَوْلِ بِالْجَهْلِ.

as there is no good in speaking with ignorance.