"As hell is a Christian construct"...
.,,.
In the main, indeed; though Isaiah & probably Jude which you cite CS, are pre-Xtn. Tho many regard Isaiah as proleptic and predictive of Christ's coming, this would clearly not be a Jewish view. But the concept of Hell is generally, in its Biblical citations, NT rather the OT otherwise; though there are some refs to Gehenna, a sort of Jewish equivalent named after a valley near Jerusalem where human sacrifices took place in evil times.

Wikipedia ~ "This article is about the Biblical term that has been interpreted as analogous to the concept of "Hell" or "Purgatory". For other uses, see Gehenna (disambiguation).
Main article: Jewish eschatology
Valley of Hinnom, c. 1900
Gehenna (Greek γέεννα), Gehinnom (Rabbinical Hebrew: גהנום/גהנם) and Yiddish Gehinnam, are terms derived from a place outside ancient Jerusalem known in the Hebrew Bible as the Valley of the Son of Hinnom (Hebrew: גֵיא בֶן־הִנֹּם or גיא בן-הינום); one of the two principal valleys surrounding the Old City.
Originally, it was believed that this was a location where children were sacrificed to Moloch, hence from the perspective of the authors of the Hebrew Bible, it was deemed to be cursed.[1]
In Jewish, Christian and Islamic scripture, Gehenna is a destination of the wicked.[2] This is different from the more neutral Sheol/Hades, the abode of the dead, though the King James version of the Bible translates both with the Anglo-Saxon word Hell."

OT refs are given in the rest of this article in wiki. But this is not altogether the Christian 'Hell", which appears indeed, apart fom that one mention in Isaiah, to be a later concept. The Gospels quote Jesus' use of the term, saying e.g. that anyone who, in anger, called his brother a fool was "in danger of Hellfire", Matt V.22.; and Jesus was a Jew, of course, tho he had clearly his own theological glosses on many of that faith's traditions an teachings.

~M~