Tosefta sur Isaïe 66:10

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.