4 occurrences across the corpus

KJV Apocrypha (Eastern Orthodox Additions)

1 Esdras 5:45

And to give into the holy treasury of the works a thousand pounds of gold, five thousand of silver, and an hundred priestly vestments.

Jubilees

Jubilees 32:9

gave him all the souls of the men And Levi discharged the priestly office at Bethel before Jacob his father in preference to his ten brothers, and he was a priest there, and Jacob gave his vow: thus

Jubilees 33:20

our God. And there is no greater sin than the fornication which they commit on earth; for Israel is a holy nation unto the Lord its God, and a nation of inheritance, and a priestly and royal nation and for (His own) possession; and there shall no such uncleanness appear in the midst of the holy

OT Pseudepigrapha

Odes of Solomon 20:1

I am a priest of the Lord, and to Him I do priestly service: and to Him I offer the sacrifice of His thought.