Hebrews 5:10

since He had received from God the title of a High Priest with the rank of Melchizedek.

Hebrews 5:5-6

So Christ too did not take upon Himself the glory of being appointed High Priest, but it was God who said: "You are my Son; I have today become your Father,"

Hebrews 6:20

(6:19) where Jesus has blazed the way for us and became a High Priest with the rank of Melchizedek.

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