Hebrews 7:17

For the words are in evidence, Thou art a priest forever after the order of Melchizedek.

Hebrews 5:6

and again, Thou art a priest forever, after the order of Melchizedek.

Hebrews 7:21

For although those priests became such without an oath, He had an oath form God who said to him, The Lord hath sworn and will not change, Thou art a priest forever.

Hebrews 6:20

whither Jesus himself is entered as a forerunner on our behalf, having become a priest forever, after the order of Melchizedek.

Hebrews 5:10

while God himself pronounced him High Priest according to the order of Melchizedek.

Hebrews 7:15

And this is yet more abundantly clear if, after the likeness of Melchizedek, there arises another Priest,

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 yet more abundantly clear if, after the likeness of Melchizedek, there arises another Priest,
Hebrews 5:6
and again, Thou art a priest forever, after the order of Melchizedek.
Hebrews 6:20
whither Jesus himself is entered as a forerunner on our behalf, having become a priest forever, after the order of Melchizedek.