Exodus 40:16

12 Then bring Aaron and his sons to the entrance to the Tent of Meeting and wash them with water.

13 And you are to clothe Aaron with the holy garments, anoint him, and consecrate him, so that he may serve Me as a priest.

14 Bring his sons forward and clothe them with tunics.

15 Anoint them just as you anointed their father, so that they may also serve Me as priests. Their anointing will qualify them for a permanent priesthood throughout their generations.”

16 Moses did everything just as the LORD had commanded him.

17 So the tabernacle was set up on the first day of the first month of the second year.

18 When Moses set up the tabernacle, he laid its bases, positioned its frames, inserted its crossbars, and set up its posts.

19 Then he spread the tent over the tabernacle and put the covering over the tent, just as the LORD had commanded him.

20 Moses took the Testimony and placed it in the ark, attaching the poles to the ark; and he set the mercy seat atop the ark.

Read all of Exodus 40