Bulugh al-Maram, Book 16, Hadith 1521 (English) ⓘ
Anas (RAA) narrated that Allah's Messenger said: “Keeping silent is considered as (an act of`) wisdom, but very few practice it.” Related by Al-Baihaqi in his book Shu'ab al-Iman with a weak chain of narrators. The sound view is that it is traced back to one of the companions who quoted it from Luqman Al-Hakim.
وَعَنْ أَنَسٍ - رضى الله عنه - قَالَ: قَالَ رَسُولُ اَللَّهِ - صلى الله عليه وسلم -{ اَلصَّمْتُ حِكْمَةٌ, وَقَلِيلٌ فَاعِلُهُ } أَخْرَجَهُ اَلْبَيْهَقِيُّ فِي " اَلشُّعَبِ" بِسَنَدٍ ضَعِيفٍ. (1937) 2 - ضعيف رواه ابن عدي في" الكامل" (5 / 1816)، والبيهقي في" الشعب" (5027)، وتحرف في" الأصل" إلى" حلم" والتصحيح من" أ"، وهو الموافق لما عند ابن عدي والبيهقي.
also referenced under: Book 16, Hadith 1478 (In-Book)