4Consider how great Melchizedek was: Even the patriarch Abraham gave him a tenth of the plunder.
5Now the law commands the sons of Levi who become priests to collect a tenth from the people — that is, from their brothers— though they too are descended from Abraham.
6But Melchizedek, who did not trace his descent from Levi, collected a tenth from Abraham and blessed him who had the promises.
— Hebrews 7:4-6