Proverbs 10:31-32

The mouth of the just bringeth forth wisdom It freely, abundantly, and constantly brings forth wise counsels, as the earth or a tree brings forth its proper fruit, as the word ינוב, here used, properly signifies; but the froward tongue shall be cut off Because it brings forth, not wisdom, but folly and wickedness. The lips of the righteous know Namely, practically, so as to consider and speak; what is acceptable To God and good men, or what is truly worthy of acceptation; for this is opposed to what is froward or wicked in the next clause. Knowledge is here ascribed to the lips, as it is to the hands, Psalms 78:72, because they are conducted by knowledge and wisdom.