“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:”
King James Version (KJV)
7:5 The sons of Levi take tithes of their brethren - Sprung from Abraham as well as themselves. The Levites therefore are greater than they; but the priests are greater than the Levites, the patriarch Abraham than the priests, and Melchisedec than him.
Heb 7:5 They that are the sons of Levi. The Aaronic priesthood, all of them of the tribe of Levi. Have a commandment to take tithes from the people according to the law. They require the enactment of the law to collect tithes of the people, their own brethren. See Nu 18:24,26,28 Ne 13:5. The tithes are paid, not because of their great spiritual dignity, but because the law compels it.