Hebrews 7:2-6

2and to him Abraham apportioned a tenth part of everything. He is first, by translation of his name, king of righteousness, and then he is also king of Salem, that is, king of peace.

3He is without father or mother or genealogy, having neither beginning of days nor end of life, but resembling the Son of God he continues a priest forever.

4See how great this man was to whom Abraham the patriarch gave a tenth of the spoils!

5And those descendants of Levi who receive the priestly office have a commandment in the law to take tithes from the people, that is, from their brothers, though these also are descended from Abraham.

6But this man who does not have his descent from them received tithes from Abraham and blessed him who had the promises.