King James Version (KJV)
Understanding is a wellspring of life unto him that hath it: but the instruction of fools is folly.
Modern English
Good sense is a fountain of life to him who has it, but the instruction of fools is folly.
Hebrew
מְק֣וֹר חַ֭יִּים שֵׂ֣כֶל בְּעָלָ֑יו וּמוּסַ֥ר אֱ֝וִלִ֗ים אִוֶּֽלֶת׃
mqvor ḥayiym shekel bʿalayv vmvsar ʾeviliym ʾivelet