Sirach 45:15

15 Moses consecrated him, and anointed him with holy oil: this was appointed unto him by an everlasting covenant, and to his seed, so long as the heavens should remain, that they should minister unto him, and execute the office of the priesthood, and bless the people in his name.

Sirach 45:15 In-Context

13 Before him there were none such, neither did ever any stranger put them on, but only his children and his children's children perpetually.

14 Their sacrifices shall be wholly consumed every day twice continually.

15 Moses consecrated him, and anointed him with holy oil: this was appointed unto him by an everlasting covenant, and to his seed, so long as the heavens should remain, that they should minister unto him, and execute the office of the priesthood, and bless the people in his name.

16 He chose him out of all men living to offer sacrifices to the Lord, incense, and a sweet savour, for a memorial, to make reconciliation for his people.

17 He gave unto him his commandments, and authority in the statutes of judgments, that he should teach Jacob the testimonies, and inform Israel in his laws.