Hebrews 7:3, 15, 17, 21

There is no record of his father or mother or any of his ancestors—no beginning or end to his life. He remains a priest forever, resembling the Son of God.

This change has been made very clear since a different priest, who is like Melchizedek, has appeared.

And the psalmist pointed this out when he prophesied, “You are a priest forever in the order of Melchizedek.”

but there was an oath regarding Jesus. For God said to him, “The LORD has taken an oath and will not break his vow: ‘You are a priest forever.’”