His bones are full [of the sins] of his youth,.... Man is born in sin, and is a transgressor from the womb; and the youthful age is addicted to many sins, as pride, passion, lust, luxury, intemperance, and uncleanness; and these are sometimes brought to mind, and men are convinced of them, and corrected for them, when more advanced in years; and if not stopped in them, and reformed from them, they are continued in an old age; and the effects of them are seen in bodily diseases, which a debauched life brings upon them, not only to the rottenness and consumption of their flesh, but to the putrefaction of their bones; though this may be understood of the whole body, the bones, the principal and stronger parts, being put for the whole, and denote that general decay and waste which gluttony, drunkenness, and uncleanness, bring into, see Pr 5:11; Some interpret this of "secret" sins, as the word is thought to signify, which, if not cleansed from and pardoned, will be found and charged on them, and be brought into judgment, and they punished for them, Ps 90:8;
which shall lie down with him in the dust: to be in the dust is to be in the state of the dead, to lie in the grave, where men lie down and sleep as on a bed; and this is common to good and bad men, all sleep in the dust of the earth, but with this difference, the sins of wicked men lie down with them; as they live in sin, they die in their sins; not that their sins die with them, and are no more, but they continue on them, and with them, and will rise with them, and will follow them to judgment, and remain with them after, and the guilt and remorse of which will be always on their consciences, and is that worm that never dies: of such it is said, that they "are gone down to hell with their weapons of war"; with the same enmity against God, against Christ, and his people, and all that is good, they had in their lifetime: and "they have laid their swords under their heads"; in the grave, and shall rise with the same revengeful spirit they ever had against the saints, see Re 20:8; "but their iniquities shall be upon their bones"; both them, and the punishment of them, Eze 32:27. The Jewish commentator last mentioned interprets the whole verse of Balaam, who died at the age of thirty three, and whose prosperity died with him, he leaving nothing to his children; and so he interprets the following verses of the curse he was forced to hide, which he would gladly have pronounced, and of the riches he received from Balak falling into the hands of the Israelites.