Hebrews 7:17

For the words are in evidence, "Thou art a priest for ever, belonging to the order of Melchizedek."

Hebrews 5:6

as also in another passage He says, "Thou art a priest for ever, belonging to the order of Melchizedek."

Hebrews 7:21

for these men hold office without any oath having been taken, but He holds it attested by an oath from Him who said to Him, "The Lord has sworn and will not recall His words, Thou art a Priest for ever" --

Hebrews 6:20

where Jesus has entered as a forerunner on our behalf, having become, like Melchizedek, a High Priest for ever.

Hebrews 5:10

For God Himself addresses Him as a High Priest for ever, belonging to the order of Melchizedek.

Hebrews 7:15

And this is still more abundantly clear when we read that it is as belonging to the order of Melchizedek that a priest of a different kind is to arise,

Treasury of Scripture Knowledge

Summary

For he testifieth, Thou art a priest for ever after the order of Melchisedec.

Bible References

General references

Hebrews 7:15
And this is still more abundantly clear when we read that it is as belonging to the order of Melchizedek that a priest of a different kind is to arise,
Hebrews 5:6
as also in another passage He says, "Thou art a priest for ever, belonging to the order of Melchizedek."
Hebrews 6:20
where Jesus has entered as a forerunner on our behalf, having become, like Melchizedek, a High Priest for ever.