Reference for Megillah 19:15

Rabbi Eliezer said: I have heard that when they were building the Temple [complex] they made curtains for the Temple and curtains for the Temple-courts; but in the case of the Temple they built from the outside, and in the case of the Temple-court they built from the inside. Rabbi Joshua said: I have heard that sacrifices may be offered even though there is no Temple, and that the most holy sacrifices may be eaten even though there are no curtains, and the less holy sacrifices and second tithes even though there is no wall [around Jerusalem]; because the first sanctification sanctified both for its own time and for the time to come.