And they said, Behold, we have sent you money to buy you burnt offerings, and sin offerings, and incense, and prepare you manna, and offer upon the altar of the Lord our God;
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Olympiodorus of Alexandria
Even though the temple had been razed to the ground, they offered sacrifices on the spot where it was built. In fact, it was unlawful to offer sacrifices in a place other than Jerusalem. - "Fragments on Baruch 1.10"