Hebrews 7:3-5

Revised Standard Version

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

⁴ See how great he is! Abraham the patriarch gave him a tithe of the spoils. ⁵ And 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 brethren, though these also are descended from Abraham.