Hebrews 7:4-6

Complete Jewish Bible

⁴ Just think how great he was! Even the Patriarch Avraham gave him a tenth of the choicest spoils. ⁵ Now the descendants of Levi who became cohanim have a commandment in the Torah to take a tenth of the income of the people, that is, from their own brothers, despite the fact that they too are descended from Avraham. ⁶ But Malki-Tzedek, even though he was not descended from Levi, took a tenth from Avraham.

Also, he blessed Avraham, the man who received God’s promises;