Hebrews 7:2-6

to whom also Abraham apportioned a tenth of all the spoils, was first of all, by the translation of his name, king of righteousness, and then also king of Salem, which is king of peace.

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

Now observe how great this man was to whom Abraham, the patriarch, gave a tenth of the choicest spoils.

And those indeed of the sons of Levi who receive the priest’s office have a commandment in the Law to collect a tenth from the people, that is, from their countrymen, although they are descended from Abraham.

But the one whose genealogy is not traced from them collected a tenth from Abraham and blessed the one who had the promises.