Hebrews 7:5-9

5And those descendants of Levi who receive the priestly office have a commandment in the law to take tithes from the people, that is, from their brothers, though these also are descended from Abraham.

6But this man who does not have his descent from them received tithes from Abraham and blessed him who had the promises.

7It is beyond dispute that the inferior is blessed by the superior.

8In the one case tithes are received by mortal men, but in the other case, by one of whom it is testified that he lives.

9One might even say that Levi himself, who receives tithes, paid tithes through Abraham,