Deuteronomy 18:5 For the Lord thy God hath chosen him out of all thy tribes, to stand to minister in the name of the Lord, him and his sons for ever. 10 I MC VC

Hebrews 7:5 And 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: MC VC