Proverbs 15:4 in the King James Version
A wholesome tongue is a tree of life: but perverseness therein is a breach in the spirit.
Context
3 The LORD’s eyes are everywhere, keeping watch on the evil and the good.
4 A gentle tongue is a tree of life, but deceit in it crushes the spirit.
5 A fool despises his father’s correction, but he who heeds reproof shows prudence.