Mithali 17 : 28 Proverbs chapter 17 verse 28

Hata mpumbavu akinyamaza, huhesabiwa hekima; Akifumba midomo yake, huhesabiwa ufahamu.
soma Mlango wa 17

Even a fool, when he keeps silent, is counted wise. When he shuts his lips, he is thought to be discerning.