Silence in wisdom versus speech in folly
Nahj al-Balāgha|Volume 1|Book 3|Chapter 182
١٨٢. وَقَالَ (عليه السلام): لَا خَيْرَ فِي الصَّمْتِ عَنِ الْحُكْمِ، كَمَا أَنَّهُ لَا خَيْرَ فِي الْقوْلِ بِالْجَهْلِ.
182. Amīr al-mu’minīn, peace be upon him, said: There is no advantage ill keeping quiet about an issue of wisdom, just as there is no good in speaking out an unintelligent thing.