Who whet their tongue like a sword - Who sharpen their tongue; that is, they utter words that will cut deep, or penetrate the soul. The idea is that of slander or reproach - the same idea which we have in Shakespeare (Cymbeline):

"'Tis slander;

Whose edge is sharper than the sword."

This comparison is a favorite one with David. Compare Psalm 52:2; Psalm 57:4; Psalm 59:7.

And bend their bows ... - That is, they prepare for this - as they make ready to shoot who bend their bows, and fix their arrows on the string. The idea here is, that this was deliberate, or was the result of counsel and purpose. It was not an outbreak of mere passion and excitement; it was by fixed design and careful preparation. See Psalm 11:2, note; Psalm 58:7, note.

Even bitter words - We apply the same term bitter now to words of malice and reproach.

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.

Who whet their tongue like a sword,.... Use cutting, wounding, killing, and devouring words; on which they set an edge, and make them keener and keener to hurt and ruin the characters and reputations of good men, and grieve and distress their minds;

and bend their bows to shoot their arrows, even bitter words; such are the these doctrines of heretical men, which are roots of bitterness, that defile some and trouble others; such are the oaths and curses of profane sinners, whose mouths are full of cursing and bitterness; and such are the blasphemies of antichrist against God, against his tabernacle, and against them that dwell therein; and such are the hard speeches spoken by ungodly sinners against Christ and his people; these are like arrows shot from a bow, and full of deadly poison. The Targum is

"they stretch out their bows, they anoint their arrows with deadly and bitter poison.''

There seems to be an allusion to fixing letters in arrows, and so shooting or directing them where it was desired they should fall and be taken up; so Timoxenus and Artobazus sent letters to one another in this way, at the siege of Potidaea (a): and after the same manner, the Jews say (b), Shebna and Joab sent letters to Sennacherib, acquainting him that all Israel were willing to make peace with him; but Hezekiah and Isaiah would not allow them to.

(a) Herodot. Urania, sive l. 8. c. 128. (b) Derash R. Aba in Kimchi in Psal. xi. 2.

Who whet their tongue like a sword, and bend their bows to shoot their arrows, even {d} bitter words:

(d) False reports and slanders.

3, 4. Similar figures for slander (Ps 57:4; 59:7).

bend-literally, "tread," or, "prepared." The allusion is to the mode of bending a bow by treading on it; here, and in Ps 58:7, transferred to arrows.

64:1-6 The psalmist earnestly begs of God to preserve him from disquieting fear. The tongue is a little member, but it boasts great things. The upright man is the mark at which the wicked aim, they cannot speak peaceably either of him or to him. There is no guard against a false tongue. It is bad to do wrong, but worse to encourage ourselves and one another in it. It is a sign that the heart is hardened to the greatest degree, when it is thus fully set to do evil. A practical disbelief of God's knowledge of all things, is at the bottom of every wickedness. The benefit of a good cause and a good conscience, appears most when nothing can help a man against his enemies, save God alone, who is always a present help.