5:6 in another place. This verse quotes Psalm 110:4 also quoted in Hebrews 5:10; 6:20; 7:17,21. Christ met all requirements for the priesthood, except that of descent from Aaron. However, he was of another priestly order, greater even than that of Aaron and Levi.
5:6 Melchisedec. Melchizedec was the mysterious priest/king who met Abraham when he returned from defeating the marauding confederation of kings from the north (see Genesis 14:17-19). In the Genesis account, he is merely called “king of Salem” (meaning “peace”) and “priest of the most high God” (the Hebrew name is El Elyon, “highest God”). The identity of Melchizedec has been vigorously debated. He is discussed in greater detail in Hebrews 7:1-21.