Who whet their tongue like a sword, and bend their bows to shoot their arrows, even bitter words: Who whet their tongue like a sword - They devise the evil they shall speak, and meditate on the most provoking, injurious, and defamatory words; as the soldier whets his sword that he may thereby the better cut down his enemies.
Their arrows - bitter words - Their defamatory sayings are here represented as deadly as poisoned arrows; for to such is the allusion here made.