Hebrews 7:24

but he, by virtue of his immortal state, hath a priesthood that does not pass by succession.

Hebrews 7:28

for the law appointed frail mortals to be high priests, but the oracle pronounc'd with an oath, which was since the law, established the son, who is crown'd with immortal perfections.

John 12:34

Upon which the people said to him, we have learnt from the law, that the Messiah is to live for ever: why do you say then, the son of man must be lift up? who is this son of man?

Romans 6:9

knowing that Christ being raised from the dead, is to die no more; death hath no more dominion over him.

Hebrews 7:8-25

besides here they that receive tithes are men who die: but there 'twas he of whom it is testified that he liveth.

Hebrews 13:8

Jesus Christ is always the same, yesterday, to-day, and for ever. be not then misled by artful, novel doctrines:

Revelation 1:18

I am he that liveth; I was dead; but now you see I am alive for all eternity, amen; and I have the keys of the grave, and of death."

Treasury of Scripture Knowledge

Summary

But this man, because he continueth ever, hath an unchangeable priesthood.

Bible References

He continueth

Hebrews 7:8
besides here they that receive tithes are men who die: but there 'twas he of whom it is testified that he liveth.
Hebrews 13:8
Jesus Christ is always the same, yesterday, to-day, and for ever. be not then misled by artful, novel doctrines:
John 12:34
Upon which the people said to him, we have learnt from the law, that the Messiah is to live for ever: why do you say then, the son of man must be lift up? who is this son of man?
Romans 6:9
knowing that Christ being raised from the dead, is to die no more; death hath no more dominion over him.
Revelation 1:18
I am he that liveth; I was dead; but now you see I am alive for all eternity, amen; and I have the keys of the grave, and of death."