Nahj al-Balagha Hadith n. 182

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 advantage ill keeping quiet about an issue of wisdom,

كَمَا أَنَّهُ لاَ خَيْرَ فِي الْقوْلِ بِالْجَهْلِ.

just as there is no good in speaking out an unintelligent thing.