'Minister as Priests' in the Bible

Thou thyself, therefore bring near unto thee - Aaron thy brother and his sons with him out of the midst of the sons of Israel, that they may minister as priests unto me, - Aaron, Nadab and Abihu, Eleazar and Ithamar sons of Aaron.

And thou shalt clothe therewith Aaron thy brother, and his sons, with him, - and shalt anoint them and install them, and hallow them, so shall they minister as priests unto me.

And, his, is the thing which thou shalt do to them to hallow them, that they may minister as priests unto me, - Take one young bullock and two rams without defect;

Thus will I hallow the tent of meeting, and the altar, - and, Aaron and his sons, will I hallow, to minister as priests unto me.

Aaron also, and his sons, shalt thou anoint, - so shalt thou hallow them to minister as priests unto me.

and shalt anoint them as thou didst anoint their father, and they shall minister as priests unto me, - so shall their anointing remain to them for an age-abiding priesthood, to their generations.