Tosefta su Isaia 66:63

Fire and mixtures [of animals] are not [actually existent] from the six days of creation, but they are considered to be [as if they are existent] from six days of creation. Rebbi Yossi says, “The fire of hell was created on the second day [of creation] and will never be extinguished, as it is said, ‘And they will go out and see the corpses of men who rebelled against Me, because their worms will not die and their fire will not be extinguished, and they will be loathsome to all mankind.’” (Isaiah 66:24) We do not say a Beracha (blessing) [on seeing the light of the fire and on smelling the spices during Havdalah] on the fire and spices of a bathhouse.

Rabbi Ishmael said: From the day that the Temple was destroyed, it would be appropriate that we not eat meat or drink wine (since these were used in the Temple service). But a court does not decree (restrictions) on the community which they cannot uphold. He would say that since they (the Romans) decree upon us that we not learn Torah, we should decree upon the community that they not marry women (since they do not know marriage and family laws), and not have children - and as a consequence, the seed of Abraham will cease. Rather, leave Israel alone (to continue to do as they now do, marrying and having families); it is better that (if they transgress), they do so inadvertently and not intentionally.