Ben Sira 45:15-25

15 Moses ordained him, and anointed him with holy oil; it was an everlasting covenant for him and for his descendants all the days of heaven, to minister to the Lord and serve as priest and bless his people in his name.
16 He chose him out of all the living to offer sacrifice to the Lord, incense and a pleasing odor as a memorial portion, to make atonement for the people.
17 In his commandments he gave him authority and statutes and judgments, to teach Jacob the testimonies, and to enlighten Israel with his law.
18 Outsiders conspired against him, and envied him in the wilderness, Dathan and Abiram and their men and the company of Korah, in wrath and anger.
19 The Lord saw it and was not pleased, and in the wrath of his anger they were destroyed; he wrought wonders against them to consume them in flaming fire.
20 He added glory to Aaron and gave him a heritage; he allotted to him the first of the first fruits, he prepared bread of first fruits in abundance;
21 for they eat the sacrifices to the Lord, which he gave to him and his descendants.
22 But in the land of the people he has no inheritance, and he has no portion among the people; for the Lord himself is his portion and inheritance.
23 Phinehas the son of Eleazar is the third in glory, for he was zealous in the fear of the Lord, and stood fast, when the people turned away, in the ready goodness of his soul, and made atonement for Israel.
24 Therefore a covenant of peace was established with him, that he should be leader of the sanctuary and of his people, that he and his descendants should have the dignity of the priesthood for ever.
25 A covenant was also established with David, the son of Jesse, of the tribe of Judah: the heritage of the king is from son to son only; so the heritage of Aaron is for his descendants.
Revised Standard Version of the Bible, copyright 1952 [2nd edition, 1971] by the Division of Christian Education of the National Council of the Churches of Christ in the United States of America. Used by permission. All rights reserved.