Hebrews 7:5

5Andκαὶthoseοἱindeedμὲνout fromἐκtheτῶνsonsυἱῶνof LeviΛευὶtheτὴνpriestly officeἱερατείανreceivingλαμβάνοντεςa commandmentἐντολὴνhaveἔχουσινto take a tenthἀποδεκατοῦνfrom theτὸνpeopleλαὸνaccording toκατὰtheτὸνlawνόμον,thatτοῦτ’isἔστινfrom theτοὺςbrothersἀδελφοὺςof themαὐτῶν,thoughκαίπερhaving comeἐξεληλυθόταςout ofἐκtheτῆςloinὀσφύοςof AbrahamἈβραάμ·

And indeed, those out from the sons of Levi receiving the priesthood have a commandment to take a tenth from the people, according to the law—that is, from their brothers, though having come forth out of the loin of Abraham.