John Calvin Commentary Leviticus 8:2

"Take Aaron and his sons with him, and the garments, and the anointing oil, and the bullock of the sin-offering, and the two rams, and the basket of unleavened bread;" — Leviticus 8:2 (ASV)

Take Aaron. He more clearly explains the mode of anointing and investing the priests by appointing the place and the assistants; for he commands the congregation to be gathered at the sanctuary; and then that Aaron and his sons should be brought out before them to be inaugurated by God’s authority into their office; and that all the people together may acknowledge that they are appointed and ordained by God.

The execution of the command, which we find connected with it in the text of Moses, must undoubtedly be referred to another time; namely, when the solemn dedication of the tabernacle was made. I have therefore considered it appropriate to move what is related here out of its proper sequence to that other time, so that the history may proceed uninterruptedly; which will greatly aid its comprehension.