Coals of juniper,
This verse, and its connection with the preceding one, may be explained in two ways. Psalms 120:4 may describe the "deceitful tongue," likening it to the sharp arrow of a mighty man, or to the fierce coals of the broom, which long keep their heat. Or it may indicate the swift and sure and overwhelming judgments of God, which are sharp and piercing as an arrow, fierce and burning as a fire. "Wickedness shall be returned on the head of the wicked; for the lying tongue is itself a sword or arrow (Psalms 3:3; Psalms 57:5), and burns like a fire (see Psalms 140:10, Psalms 140:11)." Burckhardt found the Bedouin of Sinai burning the roots of the juniper (desert broom, rithm, ritem, or genista) into coal; and says that they make the best charcoal, and throw out the most intense heat, and hold the heat for an almost indefinite time.
I. THE DECEITFUL TONGUE IS LIKE ARROWS AND COALS. This explanation falls in with the general idea of the psalm. The writer complains that, loving peace himself, he meets with nothing but hostility and treachery (see Psalms 64:3; Psalms 55:21; Psalms 59:7). Both sharpened arrows are used, which pierce deeply; and envenomed arrows, which leave a sting behind. Unkind words both pierce and sting. Similar ideas attach to the other figure. Coals of fire burn at once, and give smarting pain at once, but they also leave misery and suffering behind; and so does slanderous speech.
II. THE PUNISHMENT OF THE DECEITFUL TONGUE IS LIKE ARROWS AND COALS. On the whole, this idea is to be preferred. It is in the manner of the psalms to burst forth with an imprecation of God's judgments on the head of such treacherous and slanderous neighbors. Swift, sure, and sharp shall be the judgment of slanderers. Their punish-melt is comparable to an arrow keen in itself, and driven home with all the force with which a mighty man shoots it from his bow of steel. The woes that come on the slanderer shall be like "coals of juniper," which are "quick in flaming, fierce in blazing, and long in burning." "It is better to be the victim of slander than to be the author of it. The shafts of calumny will miss the mark, but not so the arrows of God; the coals of malice will cool, but not the fire of justice.—R.T.