Genesis 14:18

14:18 Melchizedek king of Salem brought out bread and wine. (Now he was the priest of the Most High God.)

Hebrews 6:20--7:10

6:20 where Jesus our forerunner entered on our behalf, since he became a priest forever in the order of Melchizedek.

The Nature of Melchizedek’s Priesthood

7:1 Now this Melchizedek, king of Salem, priest of the most high God, met Abraham as he was returning from defeating the kings and blessed him. 7:2 To him also Abraham apportioned a tithe of everything. His name first means king of righteousness, then king of Salem, that is, king of peace. 7:3 Without father, without mother, without genealogy, he has neither beginning of days nor end of life but is like the son of God, and he remains a priest for all time. 7:4 But see how great he must be, if Abraham the patriarch gave him a tithe of his plunder. 7:5 And those of the sons of Levi who receive the priestly office have authorization according to the law to collect a tithe from the people, that is, from their fellow countrymen, although they too are descendants of Abraham. 7:6 But Melchizedek who does not share their ancestry collected a tithe from Abraham and blessed the one who possessed the promise. 7:7 Now without dispute the inferior is blessed by the superior, 7:8 and in one case tithes are received by mortal men, while in the other by him who is affirmed to be alive. 7:9 And it could be said that Levi himself, who receives tithes, paid a tithe through Abraham. 7:10 For he was still in his ancestor Abraham’s loins when Melchizedek met him.