Hebrews 7:8-10

Complete Jewish Bible

⁸ Moreover, in the case of the cohanim, the tenth is received by men who die; while in the case of Malki-Tzedek, it is received by someone who is testified to be still alive.

⁹ One might go even further and say that Levi, who himself receives tenths, paid a tenth through Avraham; ¹⁰ inasmuch as he was still in his ancestor Avraham’s body when Malki-Tzedek met him.