King James Version (KJV)
The heart also of the rash shall understand knowledge, and the tongue of the stammerers shall be ready to speak plainly. {rash: Heb. hasty} {plainly: or, elegantly}
Modern English
The heart of the rash will understand knowledge, and the tongue of the stammerers will be ready to speak plainly.
Hebrew
וּלְבַ֥ב נִמְהָרִ֖ים יָבִ֣ין לָדָ֑עַת וּלְשׁ֣וֹן עִלְּגִ֔ים תְּמַהֵ֖ר לְדַבֵּ֥ר צָחֽוֹת׃
vlbab nimhariym yabiyn ladaʿat vlshvon ʿilgiym tmaher ldaber ṣaḥvot