Verse 14. - A generation, whose teeth are as swords, and their jaw teeth as knives. The fourth evil is insatiable cupidity, which leads to oppression and injurious treatment of the helpless and poor, which makes men as cruel and remorseless in destroying others and despoiling them of their substance, as the very steel which they use in their operations. Similarly, the psalmist speaks of his enemies as men "whose teeth are spears and arrows, and their tongue a sharp sword" (Psalm 57:4; comp. Isaiah 9:12; Jeremiah 5:17). To devour the poor from off the earth; i.e. so as to be no more seen in the world. Amos 8:4, "Hear this, O ye that would swallow up the needy, and cause the poor of the land to fail" (comp. Psalm 14:4).

30:10 Slander not a servant to his master, accuse him not in small matters, to make mischief. 11-14. In every age there are monsters of ingratitude who ill-treat their parents. Many persuade themselves they are holy persons, whose hearts are full of sin, and who practise secret wickedness. There are others whose lofty pride is manifest. There have also been cruel monsters in every age. 15-17. Cruelty and covetousness are two daughters of the horseleech, that still cry, Give, give, and they are continually uneasy to themselves. Four things never are satisfied, to which these devourers are compared. Those are never rich that are always coveting. And many who have come to a bad end, have owned that their wicked courses began by despising their parents' authority. 18-20. Four things cannot be fully known. The kingdom of nature is full of marvels. The fourth is a mystery of iniquity; the cursed arts by which a vile seducer gains the affections of a female; and the arts which a vile woman uses to conceal her wickedness. 21-23 Four sorts of persons are very troublesome. Men of low origin and base spirit, who, getting authority, become tyrants. Foolish and violent men indulging in excesses. A woman of a contentious spirit and vicious habits. A servant who has obtained undue influence. Let those whom Providence has advanced from low beginnings, carefully watch against that sin which most easily besets them.There is a generation whose teeth are as swords,.... As sharp as swords; like such the beasts of prey have; cruel, barbarous, and inhuman creatures; see Psalm 57:4;

and their jaw teeth as knives; exceeding sharp and biting:

to devour the poor from off the earth, and the needy from among men: by their tyranny, oppression, and cruelty, to deprive them of the little they have; and even to take away their lives from them, and utterly destroy them; of this disposition are all tyrants and persecutors: such were Rome Pagan, compared to a red dragon in the times of the ten Heathen persecutions; and such is Rome Papal, signified by a beast, like a leopard, bear, and lion; and which has been drunk with the blood of the saints.