TT opens the miluim narrative with the command to gather Aharon, his sons, the garments, the anointing oil, the chatas bull, the two rams, and the basket of matzos.
קח את אהרן ואת בניו אתו ואת הבגדים ואת שמן המשחה ואת פר החטאת ואת שני האילים ואת סל המצות — ציווי על הכנת כל צרכי המילואים.
“Take Aharon and his sons with him, and the garments, and the anointing oil, and the bull of the sin-offering, and the two rams, and the basket of unleavened bread” — the command to prepare all the requirements of the consecration ceremony.
Custom — introductory command for the miluim.
Moshe is commanded to assemble Aharon, his sons, the priestly garments, the anointing oil, the chatas bull, the two rams, and the basket of matzos for the consecration.