Matthew 5:29 And if thy right eye offend thee, pluck it out, and cast it from thee: for it is profitable for thee that one of thy members should perish, and not that thy whole body should be cast into
hell. 30 And if thy right hand offend thee, cut it off, and cast it from thee: for it is profitable for thee that one of thy members should perish, and not that thy whole body should be cast into
hell.
Matthew 18:7 Woe unto the world because of offences! for it must needs be that offences come; but woe to that man by whom the offence cometh! 8 Wherefore if thy hand or thy foot offend thee, cut them off, and cast them from thee: it is better for thee to enter into life halt or maimed, rather than having two hands or two feet to be cast into
everlasting fire. 9 And if thine eye offend thee, pluck it out, and cast it from thee: it is better for thee to enter into life with one eye, rather than having two eyes to be cast into
hell fire.
Textus Receptus Greek Text King James Bible With Strongs Dictionary
You can check for yourself for that Greek word "yeeva" or "geena" before it was translated into English. Scroll down on the left column to Matthew to click on the numbered chapter that you want to view.
Strong's Concordance has made an error in this definition "of Hebrew origin (1516 and Hinnom
2011); valley of (the son of) Hinnom; ge-henna (or Ge-Hinnom), a valley of Jerusalem, used (figuratively) as a name for the place (or state) of everlasting punishment:--hell."
It depends on how one reads it because a lot of believers are referring to that hell or even as that lake of fire from those passages pertaining to the afterlife, but since Jesus referred to that place that is on earth, then He is not referring to the afterlife of hell and the lake of fire, but that hell or that fire coming on earth that saved but not abiding believers would be at risk in being cast into.
You will see it for Matthew 5:29-30 for what hell was derived from and you will see it in Matthew 18:9 from where hell fire is derived from, but the kicker is in Matthew 18:8 where everlasting fire is derived from aiwnioV or aionios whic is defined by Strong's Concordance as "from aiwn - aion
165; perpetual (also used of past time, or past and future as well):--eternal, for ever, everlasting, world (began)."
It is no wonder believers read that into yeeva or geena for the after life from that Matthew 18:8 above but again I point out that is how Gehenna is described in scriptures and that is on earth. If you consider the fire that is coming on the earth in Luke 12:49 & Revelation 8:7 & 2 Peter 3:3-13, for how there will be dead bodies left unburied in fallen Babylon Revelation 18:1-24, that is very much like Gehenna on earth.
Now while this is going on in that third part of the world ( * the western hemisphere as USA is that fallen Babylon, for how else can the rest of the armies of the world be prophesied as marching against Jerusalem at the end of the great tribulation? ) when Jesus comes back at the end of the great tribulation in defeating the world's armies and Satan is in the pit for a thousand years, there will be a new heavens and a new earth for why that Gehenna or that everlasting fire will end on earth.
So that Gehenna at which saved but unrepentant believers that are being cast into, is that hell or that fire that is coming on the earth.