Verses 22-24. - Future generations and foreign visitants, seeing the calamities with which the rebels had been visited, nay, all nations, should ask, in astonishment and horror, Wherefore hath the Lord done thus unto this land? what meaneth the heat of this great anger? It is evident from this that Moses contemplates, and in fact here predicts, a defection, not of individuals or families merely, but of the nation as a whole from the Lord, and the punishment which came in consequence upon the nation. The words from "when they see" (ver. 22) to "wrath" (ver. 23) are a parenthesis, in which a reason for the main thought is given in a circumstantial clause; and the "say" of ver. 22 is resumed by the "say" of ver. 24.

29:22-28 Idolatry would be the ruin of their nation. It is no new thing for God to bring desolating judgments on a people near to him in profession. He never does this without good reason. It concerns us to seek for the reason, that we may give glory to God, and take warning to ourselves. Thus the law of Moses leaves sinners under the curse, and rooted out of the Lord's land; but the grace of Christ toward penitent, believing sinners, plants them again in their land; and they shall no more be pulled up, being kept by the power of God.So that the generation to come of your children that shall rise up after you,.... Not the next generation, but in future times, in ages to come, at a great distance, even after the destruction of Judea by the Romans; to which Deuteronomy 29:23 seems to refer:

and the stranger that shall come from a far land; on trade and business, or for the sake of travelling, his road either lying through it, or his curiosity leading him to see it:

shall say, when they see the plagues of the land; cities and towns in ruins, fields lie uncultivated, and the whole land depopulated, and all become a barren wilderness, which was once a fruitful country, a land flowing with milk and honey:

and the sicknesses which the Lord hath laid upon it; upon the inhabitants of it, as the pestilence and other diseases, which shall have swept the land of them; see Deuteronomy 28:22. This case supposes a general departure from the worship of God to the service of idols; otherwise single individuals are punished in their own persons, as in the Deuteronomy 29:21.