חוֹשֵׂ֣ךְ אֲ֭מָרָיו יוֹדֵ֣עַ דָּ֑עַת וקר־[יְקַר־] ר֝֗וּחַ אִ֣ישׁ תְּבוּנָֽה׃
He that spareth his words hath knowledge; And he that husbandeth his spirit is a man of discernment.
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.