Hebrews 10:9

and then there is added-- 'See, I have come to do thy will.' The former sacrifices are set aside to be replaced by the latter.

Hebrews 10:7

So I said, "See, I have come' (as is written of me in the pages of the Book), "To do thy will, O God."'

Hebrews 7:18-19

On the one hand, we have the abolition of a previous regulation as being both inefficient and useless

Hebrews 8:7-13

If that first Covenant had been faultless, there would have been no occasion for a second.

Hebrews 9:11-14

But, when Christ came, he appeared as High Priest of that Better System which was established; and he entered through that nobler and more perfect 'Tabernacle,' not made by human hands--that is to say, not a part of this present creation.

Hebrews 12:27-28

And those words 'still once more' indicate the passing away of all that is shaken--that is, of all created things--in order that only what is unshaken may remain.

Treasury of Scripture Knowledge

Summary

Then said he, Lo, I come to do thy will, O God. He taketh away the first, that he may establish the second.

Bible References

He taketh

Hebrews 7:18
On the one hand, we have the abolition of a previous regulation as being both inefficient and useless
Hebrews 8:7
If that first Covenant had been faultless, there would have been no occasion for a second.
Hebrews 12:27
And those words 'still once more' indicate the passing away of all that is shaken--that is, of all created things--in order that only what is unshaken may remain.