Hebrews 7:2

For this Melchizedek, king of Salem, priest of God Most High, who met Abraham returning from the slaughter of the kings and blessed him,

without father, without mother, without genealogy, having neither beginning of days nor end of life, but made like the Son of God), remains a priest continually.

Now consider how great this man was, to whom even Abraham the patriarch gave a tenth out of the best plunder.

They indeed of the sons of Levi who receive the priest’s office have a commandment to take tithes from the people according to the law, that is, of their brothers, though these have come out of the body of Abraham,