Hebrews 7:11

If therefore perfection were by the Levitical priesthood, (for under it the people received the law,) what further need was there that another priest should rise after the order of Melchizedek, and not be called after the order of Aaron?

Hebrews 8:7

For if that first covenant had been faultless, then should no place have been sought for the second.

Galatians 2:21

I do not nullify the grace of God: for if righteousness comes by the law, then Christ is dead in vain.

Hebrews 5:6

As he says also in another place, You are a priest forever after the order of Melchizedek.

Hebrews 7:17-19

For he testifies, You are a priest forever after the order of Melchizedek.

Galatians 4:3

Even so we, when we were children, were in bondage under the elements of the world:

Galatians 4:9

But now, after you have known God, or rather are known of God, how turn you again to the weak and beggarly elements, to which you desire again to be in bondage?

Colossians 2:10-17

And you are complete in him, who is the head of all principality and power:

Hebrews 5:10

Called of God a high priest after the order of Melchizedek.

Hebrews 6:20

Where the forerunner is for us entered, even Jesus, made a high priest forever after the order of Melchizedek.

Hebrews 7:15

And it is yet far more evident: that after the similitude of Melchizedek there arises another priest,

Hebrews 7:21

(For those priests were made without an oath; but this with an oath by him that said unto him, The Lord swore and will not change, you are a priest forever after the order of Melchizedek:)

Hebrews 8:10-13

For this is the covenant that I will make with the house of Israel after those days, says the Lord; I will put my laws into their mind, and write them in their hearts: and I will be to them a God, and they shall be to me a people:

Hebrews 10:1-4

For the law having a shadow of good things to come, and not the very image of the things, can never with those sacrifices which they offered year by year continually make the ones approaching perfect.

Treasury of Scripture Knowledge

Summary

If therefore perfection were by the Levitical priesthood, (for under it the people received the law,) what further need was there that another priest should rise after the order of Melchisedec, and not be called after the order of Aaron?

General references

Bible References

Perfection

Hebrews 7:18
For there is verily an annulment of the previous commandment because of the weakness and uselessness thereof.
Hebrews 8:7
For if that first covenant had been faultless, then should no place have been sought for the second.
Hebrews 10:1
For the law having a shadow of good things to come, and not the very image of the things, can never with those sacrifices which they offered year by year continually make the ones approaching perfect.
Galatians 2:21
I do not nullify the grace of God: for if righteousness comes by the law, then Christ is dead in vain.
Galatians 4:3
Even so we, when we were children, were in bondage under the elements of the world:
Colossians 2:10
And you are complete in him, who is the head of all principality and power:

What

Hebrews 7:26
For such a high priest was befitting for us, who is holy, harmless, undefiled, separate from sinners, and made higher than the heavens;

Another

Hebrews 7:15
And it is yet far more evident: that after the similitude of Melchizedek there arises another priest,
Hebrews 5:6
As he says also in another place, You are a priest forever after the order of Melchizedek.
Hebrews 6:20
Where the forerunner is for us entered, even Jesus, made a high priest forever after the order of Melchizedek.

General references

Numbers 20:26
And strip Aaron of his garments, and put them upon Eleazar his son: and Aaron shall be gathered unto his people, and shall die there.