Targum zu Schemot 39:33

And they brought the tabernacle to Mosheh at his house of instruction, (beth Midrash,) where sat Mosheh, and Aharon, and his sons, where he gave direction to them concerning the order of the priesthood; and there, and Aharon, (also) sat the elders of Israel. And they brought to him the tabernacle and all its vessels: its taches, its boards, its bars, its pillars, and its bases;