Adam Clarke Bible Commentary
They die in youth - Exactly what the psalmist says, "Bloody and deceitful men shall not live out half their days," Psa 55:23. Literally, the words of Elihu are, "They shall die in the youth of their soul."
Their life is among the unclean - בקדשים bakedeshim, among the whores, harlots, prostitutes, and sodomites. In this sense the word is used, though it also signifies consecrated persons; but we know that in idolatry characters of this kind were consecrated to Baal and Ashtaroth, Venus, Priapus, etc. Mr. Good translates the rabble. The Septuagint: Their life shalt be wounded by the angels.
Jamieson-Fausset-Brown Bible Commentary
Rather (Deu 23:17), Their life is (ended) as that of (literally, "among") the unclean, prematurely and dishonorably. So the second clause answers to the first. A warning that Job make not common cause with the wicked (Job 34:36).
John Gill Bible Commentary
They die in youth,.... They, or "their soul" (u); which, though that dies not, being immaterial and immortal; yet being the principal part of man, is put for the whole person, and which being taken away, the body dies. All men must die, but all do not die at an age; there is a common term of human life, Psa 90:10; some few exceed it, multitudes arrive not to it; such who die before it may be said to die in youth; it seems to signify premature and untimely death: the word signifies an "excussion", or violent shaking out; and the Vulgate Latin version is, "in a tempest"; in a tempest of divine wrath, and in a storm in their consciences, Job 27:20. Jarchi interprets it by suffocation or strangling;
and their life is among the unclean: all men are by nature unclean, and all that is in them; some are more notoriously and openly so than others, who give themselves over to lasciviousness, to work all uncleanness with greediness; such as whoremongers and fornicators, of whom Mr. Broughton understands those unclean persons; or Sodomites, of whom the word is sometimes used, Deu 23:17. And this may be understood either of the present life of hypocrites before they die; who are unclean persons themselves, whatever show of purity they make, and love to live and converse, at least privately, if not openly, with unclean persons, and die while they live with such and in their sins: or of their life after death; for wicked men live after death; their souls live in hell, and their bodies at the resurrection will be raised to life, and be reunited to their souls, and both together will live in endless punishment; and the life of hypocrites will be among such; as is a man in life, so he is at and after death; if filthy, filthy still; and such will have no admittance into the heavenly state, and with such impure ones, hypocrites will live for ever, Rev 21:8.
(u) "anima eorum", Pagninus, Montanus, Tigurine version, Vatablus, Junius & Tremellius, Piscator, &c.