Charles Ellicott Commentary Proverbs 10:11

"The mouth of the righteous is a fountain of life; But violence covereth the mouth of the wicked." — Proverbs 10:11 (ASV)

Violence covereth the mouth of the wicked.—If these words are to be taken as in Proverbs 10:6, then the first line must mean that the righteous person speaks to their own profit. But perhaps it will be better here to interpret the second line in the sense of “the mouth of the godless hides violence,” i.e., it conceals under deceitful words the mischief intended for others. With God is the well of life (Psalms 36:9; Revelation 22:17); and similarly, the mouth of the righteous brings comfort and refreshment to the weary and heavy laden.