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Job 20:11ESV·author unknown

His bones are full of his youthful vigor, but it will lie down with him in the dust.

Matthew Henry Presbyterian @wholebiblehenry

The instances here given of the miserable condition of the wicked man in this world are expressed with great fulness and fluency of language, and the same thing returned to again and repeated in other words. Let us therefore reduce the particulars to their proper heads, and observe, I. What his wickedness is for which he is punished. 1.

Commenting on Job 20:10-22

John Gill Reformed Baptist @doctorgill

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...

Jamieson-Fausset-Brown Reformed @jfbcommentary

(Psa 25:7), so Vulgate. GESENIUS has "full of youth"; namely, in the fulness of his youthful strength he shall be laid in the dust. But "bones" plainly alludes to Job's disease, probably to Job's own words (Job 19:20). UMBREIT translates, "full of his secret sins," as in Psa 90:8; his secret guilt in his time of seeming righteousness, like secret poison, at last lays him in the dust.