In Parshat Acharei Mot (Vayikra, Chapter 17) we learn that animals that have been consecrated as offerings must be brought to Ohel Moed (the Tent of Meeting) and sacrificed on the Mizbeach (Altar). They must be slaughtered in the Sanctuary area and their service must be performed in the Sanctuary area as well. This was true during the entire time that B’nai Yisrael spent in the desert.

Once they get to the Land of Israel, things change, as we see in Dvarim 12:20-21:

When Hashem, your God will broaden your boundary as He spoke to you, and you say, “I would eat meat.” For you will have desire to eat meat, to your........

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