John Gill Bible Commentary

A false witness that speaketh lies,.... Or, "that speaketh lies, even a false witness" (f); and so this is distinguished from a lying tongue, the second of these evils: this is the sin of bearing false witness against one's neighbour, a breach of the eighth command. It may be rendered, "he that bloweth lies" (g); that raises lies, and spreads them abroad, and swears to them, to the damage of others. This makes the sixth; and the seventh follows, and him that soweth discord among brethren; whether in a natural relation, or in a civil society, or in a religious community. (f) So Vatablus, Mercerus, &c. (g) "qui efflat mendacia", Piscator, Michaelis.