Hebrews 7:5-9

5Now the law of Moses required that the priests, who are descendants of Levi, must collect a tithe from the rest of the people of Israel, who are also descendants of Abraham.

6But Melchizedek, who was not a descendant of Levi, collected a tenth from Abraham. And Melchizedek placed a blessing upon Abraham, the one who had already received the promises of God.

7And without question, the person who has the power to give a blessing is greater than the one who is blessed.

8The priests who collect tithes are men who die, so Melchizedek is greater than they are, because we are told that he lives on.

9In addition, we might even say that these Levites—the ones who collect the tithe—paid a tithe to Melchizedek when their ancestor Abraham paid a tithe to him.