The man - shall surely die - Literally בן מות ben maveth, "he is a son of death," a very bad man, and one who deserves to die. But the law did not sentence a sheep-stealer to death; let us hear it: If a man steal an ox or a sheep, he shall restore Five Oxen for an ox, and Four Sheep for a sheep, Exodus 22:1; and hence David immediately says, He shall restore the lamb Fourfold.

And David's anger was greatly kindled against the man,.... That had done this, taking it for a real fact:

and he said to Nathan, as the Lord liveth, the man that hath done this thing shall surely die; which be said in the transport of his wrath and fury; otherwise a thief, according to the law of Moses, was not to be put to death, but to make restitution; and if he was not able to make it, then to be sold, but he was not to die for it; but David thought the crime was so greatly aggravated by being done by a rich man, and by the loss the poor man sustained, it being his all, and the fact, in all its circumstances, so cruel and barbarous, that the guilty person ought to die: how much more vehemently, and indeed with justice, would he have passed the sentence of death on him, or condemned him to it, had it been put in the parable, that the rich man not only took the poor man's ewe lamb, but killed the poor man himself? but this Nathan left out, that David might not take his meaning, as Abarbinel thinks, who then would have been upon his guard, and not have condemned himself; and hereby also Nathan had this advantage against him, that if this man deserved to die, who had only taken the poor man's ewe lamb, then how much more ought he to die, who had not only committed adultery with Bathsheba, but had slain Uriah?

David was so enraged at this act of violence on the part of the rich man, that in the heat of his anger he pronounced this sentence at once: "As the Lord liveth, the man who did this deserves to die; and the lamb he shall restore fourfold." The fourfold restoration corresponds to the law in Exodus 22:1. The culprit himself was also to be put to death, because the forcible robbery of a poor man's pet-lamb was almost as bad as man-stealing.

And David's anger was greatly kindled against the man; and he said to Nathan, As the LORD liveth, the man that hath done this thing shall surely die:

12:5 Is worthy to die - This seems to be more than the fact deserved, or than he had commission to inflict for it, Exod 22:1. But it is observable, that David now when he was most indulgent to himself, and to his own sin, was most severe and even unjust to others; as appears by this passage, and the following relation, ver.31, which was done in the time of David's impenitent continuance in his sin.

shall...: or, is worthy to die, or, is a son of death

5. the man that hath done this thing shall surely die-This punishment was more severe than the case deserved, or than was warranted by the divine statute (Ex 22:1). The sympathies of the king had been deeply enlisted, his indignation aroused, but his conscience was still asleep; and at the time when he was most fatally indulgent to his own sins, he was most ready to condemn the delinquencies and errors of others.

12:1-14 God will not suffer his people to lie still in sin. By this parable Nathan drew from David a sentence against himself. Great need there is of prudence in giving reproofs. In his application, he was faithful. He says in plain terms, Thou art the man. God shows how much he hates sin, even in his own people; and wherever he finds it, he will not let it go unpunished. David says not a word to excuse himself or make light of his sin, but freely owns it. When David said, I have sinned, and Nathan perceived that he was a true penitent, he assured him his sin was forgiven. Thou shalt not die: that is, not die eternally, nor be for ever put away from God, as thou wouldest have been, if thou hadst not put away the sin. Though thou shalt all thy days be chastened of the Lord, yet thou shalt not be condemned with the world. There is this great evil in the sins of those who profess religion and relation to God, that they furnish the enemies of God and religion with matter for reproach and blasphemy. And it appears from David's case, that even where pardon is obtained, the Lord will visit the transgression of his people with the rod, and their iniquity with stripes. For one momentary gratification of a vile lust, David had to endure many days and years of extreme distress.