Proverbs 16:22 in the King James Version
Understanding is a wellspring of life unto him that hath it: but the instruction of fools is folly.
Context
21 The wise in heart shall be called prudent. Pleasantness of the lips promotes instruction.
22 Understanding is a fountain of life to one who has it, but the punishment of fools is their folly.
23 The heart of the wise instructs his mouth, and adds learning to his lips.