28 Tell them, As I live - God's decree - here's what I'm going to do: 29 Your corpses are going to litter the wilderness - every one of you twenty years and older who was counted in the census, this whole generation of grumblers and grousers. 30 Not one of you will enter the land and make your home there, the firmly and solemnly promised land, except for Caleb son of Jephunneh and Joshua son of Nun. 31 "Your children, the very ones that you said would be taken for plunder, I'll bring in to enjoy the land you rejected 32 while your corpses will be rotting in the wilderness. 33 These children of yours will live as shepherds in the wilderness for forty years, living with the fallout of your whoring unfaithfulness until the last of your generation lies a corpse in the wilderness. 34 You scouted out the land for forty days; your punishment will be a year for each day, a forty-year sentence to serve for your sins - a long schooling in my displeasure. 35 "I, God, have spoken. I will most certainly carry out these things against this entire evil-infested community which has banded together against me. In this wilderness they will come to their end. There they will die."
Matthew Henry's Commentary on Numbers 14:28-35
Commentary on Numbers 14:20-35
(Read Numbers 14:20-35)
The Lord granted the prayer of Moses so far as not at once to destroy the congregation. But disbelief of the promise forbids the benefit. Those who despise the pleasant land shall be shut out of it. The promise of God should be fulfilled to their children. They wished to die in the wilderness; God made their sin their ruin, took them at their word, and their carcases fell in the wilderness. They were made to groan under the burden of their own sin, which was too heavy for them to bear. Ye shall know my breach of promise, both the causes of it, that it is procured by your sin, for God never leaves any till they first leave him; and the consequences of it, that will produce your ruin. But your little ones, now under twenty years old, which ye, in your unbelief, said should be a prey, them will I bring in. God will let them know that he can put a difference between the guilty and the innocent, and cut them off without touching their children. Thus God would not utterly take away his loving kindness.