ἱερατεία G2405
hierateía · hee-er-at-i'-ah · Noun Feminine
from ἱερατεύω; priestliness, i.e. the sacerdotal function:--office of the priesthood, priest's office.
2 Occurrences in the King James Bible
Luke 1:9According to the custom of the priest’s office, his lot was to burn incense when he went into the temple of the Lord.
Hebrews 7:5And verily they that are of the sons of Levi, who receive the office of the priesthood, have a commandment to take tithes of the people according to the law, that is, of their brethren, though they come out of the loins of Abraham: