Hebrews 7:3-5

New International Version - UK

³ Without father or mother, without genealogy, without beginning of days or end of life, resembling the Son of God, he remains a priest for ever.

⁴ Just think how great he was: even the patriarch Abraham gave him a tenth of the plunder! ⁵ Now the law requires the descendants of Levi who become priests to collect a tenth from the people – that is, from their fellow Israelites – even though they also are descended from Abraham.