Charles Ellicott Commentary Leviticus 8:13

"And Moses brought Aaron`s sons, and clothed them with coats, and girded them with girdles, and bound head-tires upon them; as Jehovah commanded Moses." — Leviticus 8:13 (ASV)

And Moses brought Aaron’s sons.—Having consecrated the father as high priest, Moses now invests Aaron’s four sons, Nadab, Abihu, Eleazar, and Ithamar, with the visible signs of the priestly office by robing them in the sacerdotal garments. For these articles of dress see Exodus 28:40-41; Exodus 29:30; Exodus 40:14.