חוֹשֵׂ֣ךְ אֲ֭מָרָיו יוֹדֵ֣עַ דָּ֑עַת וקר־[יְקַר־] ר֝֗וּחַ אִ֣ישׁ תְּבוּנָֽה׃
Kto w słowach swych powściągliwy, zna rozum, a kto zimną krew zachowuje jest człowiekiem roztropnym.
Rashi on Proverbs
keeps back his words He who has knowledge does not talk excessively.
Rashi on Proverbs
he whose breath is dear (Whose words are dear; Salonica ed.) He who keeps back his words is a man of understanding.