The getting of treasures by a lying tongue is a vanity tossed to and fro of them that seek death.
All Commentaries on Proverbs 21:6 Go To Proverbs 21
The Didache
AD 100
Do not be doubleminded or doubletongued, for a double tongue is a “deadly snare.” Your words shall not be dishonest or hollow but substantiated by action. Do not be greedy or threatening or hypocritical or malicious or arrogant. Do not plot against your neighbor. Do not hate anybody. Reprove some, pray for others, and still others love more than your own life.