Hebrews 7:4-6

Goodspeed(i) 4 Now see how great this man must have been to have the patriarch Abraham give him a tenth of the spoil. 5 Those of the descendants of Levi who are appointed to the priesthood are directed by the Law to collect tithes from the people, that is, from their own brothers, although they are descended from Abraham like themselves. 6 But this man, whose ancestry is not connected with theirs, collected tithes from Abraham himself, and gave his blessing to the man who had received the promises from God.