Zevachim14: 4
עַד שֶׁלֹּא הוּקַם הַמִּשְׁכָּן, הָיוּ הַבָּמוֹת מֻתָּרוֹת, וַעֲבוֹדָה בִבְכוֹרוֹת. מִשֶּׁהוּקַם הַמִּשְׁכָּן, נֶאֶסְרוּ הַבָּמוֹת, וַעֲבוֹדָה בְכֹהֲנִים. קָדְשֵׁי קָדָשִׁים נֶאֱכָלִים לִפְנִים מִן הַקְּלָעִים; קָדָשִׁים קַלִּים בְּכָל מַחֲנֵה יִשְׂרָאֵל.
Until the Tabernacle was erected, bamos were permitted and the service was [performed] by the firstborns. When the Tabernacle was erected, the bamos became forbidden and the service was [performed] by Kohanim. The most holy offerings were eaten within the curtains; the offerings of lesser holiness throughout the Israelite camp.