Strong H3550 כְּהֻנָּה kehûnnâh · priesthood

Exodus

1. Exodus 29:9
   And thou shalt gird them with girdles, Aaron and his sons, and put the bonnets on them: and the priest’s office shall be theirs for a perpetual statute: and thou shalt consecrate Aaron and his sons.
2. Exodus 40:15
   And thou shalt anoint them, as thou didst anoint their father, that they may minister unto me in the priest’s office: for their anointing shall surely be an everlasting priesthood throughout their generations.