Proverbs 15:4 in the World English Bible
A gentle tongue is a tree of life, but deceit in it crushes the spirit.
Context
3 The eyes of the LORD are in every place, beholding the evil and the good.
4 A wholesome tongue is a tree of life: but perverseness therein is a breach in the spirit.
5 A fool despiseth his father’s instruction: but he that regardeth reproof is prudent.