Marcos 9:48

Where their worm dieth not, and the fire is not quenched.

These words were repeated in Mark 9:44 and Mark 9:46, both of which are omitted in the English Revised Version (1885). They are a description of Gehenna, the valley of Hinnom (translated "hell" in this version), and were added to emphasize the undesirability and the awfulness of the place where the wicked shall be punished with "everlasting destruction." It should be noted that like other descriptions of hell in the New Testament, the purpose is not that of describing hell but rather showing its awful nature. Worms and fire, in nature, do not exist in the same place; and thus, as in the case of "fire and brimstone" and "outer darkness," are actually opposed to each other. It is thus clear that Christ is not here describing hell but warning people of its horrible character. When it is considered that hell is such an awful place that Christ had recourse to such terrible words as these in his warnings against it, the soul draws back at the very contemplation of such a place.