Hebrews 5:6

as also he says in another place, Thou art a priest forever after the order of Melchizedek.

Hebrews 7:17

For it is testified, Thou art a priest forever after the order of Melchizedek.

Hebrews 7:21

but He with an oath through the one saying to him, The Lord hath sworn, and will not regret it; thou art a priest forever;

Hebrews 5:10

having been ordained of God a high priest after the order of Melchizedek.

Hebrews 6:20

whither Jesus the forerunner has entered in our behalf, having been made a high priest forever after the order of Melchizedek.

Hebrews 7:3

without father, without mother, without genealogy, having neither beginning of days nor end of life, but being made like unto the Son of God, he abides a priest continually.

Hebrews 7:15

And it is still more abundantly evident, if after the similitude of Melchizedek another priest rises,

Treasury of Scripture Knowledge

Summary

As he saith also in another place, Thou art a priest for ever after the order of Melchisedec.

General references

Bible References

Thou

Hebrews 5:10
having been ordained of God a high priest after the order of Melchizedek.
Hebrews 6:20
whither Jesus the forerunner has entered in our behalf, having been made a high priest forever after the order of Melchizedek.
Hebrews 7:3
without father, without mother, without genealogy, having neither beginning of days nor end of life, but being made like unto the Son of God, he abides a priest continually.

General references

Hebrews 5:10
having been ordained of God a high priest after the order of Melchizedek.
Hebrews 7:17
For it is testified, Thou art a priest forever after the order of Melchizedek.