If, therefore, any one shall violently suppose that the destruction of the soul and the flesh in hell amounts to a final annihilation of the two substances, and not to their penal treatment (as if they were to be consumed, not punished), let him recollect that the fire of hell is eternal—expressly announced as an everlasting penalty; and let him then admit that it is from this circumstance that this never-ending “killing” is more formidable than a merely human murder, which is only temporal. He will then come to the conclusion that substances must be eternal, when their penal “killing” is an eternal one. Since, then, the body after the resurrection has to be killed by God in hell along with the soul, we surely have sufficient information in this fact respecting both the issues which await it, namely the resurrection of the flesh, and its eternal “killing.” Else it would be most absurd if the flesh should be raised up and destined to “the killing in hell,” in order to be put an end to, when it might suffer such an annihilation (more directly) if not raised again at all.
Tertullian
On the Resurrection of the Flesh
Chapter XXXV