Hebrews 9:25

Nor was it necessary for Him to offer Himself [to God] often, like the head priest does, who enters the Holy of Holies year after year with blood that belongs to others [i.e., the blood of animal sacrifices].

Hebrews 9:7

But [only] once a year the head priest goes alone into the inner room [i.e., Holy of Holies], and never without [animal] blood, which he offers [as a sacrifice] for himself and for the sins done in ignorance by the people.

Hebrews 10:19

Therefore, brothers, since we have confidence to enter the Holy of Holies [i.e., heaven] by means of the blood of Jesus,

Hebrews 9:12

And He did not enter [the heavenly Holy of Holies] by means of the blood of goats and calves but, by means of His own blood He entered the Holy of Holies [i.e., heaven] once for all time, [after] having obtained never ending redemption [i.e., salvation for us on the cross].

Hebrews 9:14

how much more will the blood of Christ, who through the eternal Holy Spirit [or, His eternal Spirit] offered Himself without [moral] blemish to God, cleanse our consciences from deeds which lead to [spiritual] death to serve the living God?

Hebrews 9:26

For then He would have had to suffer often since the creation of the world; but now at the end of the ages [i.e., the final period of world history] He has been revealed once [for all] to remove sin by sacrificing Himself.

Hebrews 10:10

By [Christ doing] what God wanted, we have been set aside for God through Jesus Christ offering His body once for all time.

Treasury of Scripture Knowledge

Summary

Nor yet that he should offer himself often, as the high priest entereth into the holy place every year with blood of others;

Bible References

Offer

Hebrews 9:7
But [only] once a year the head priest goes alone into the inner room [i.e., Holy of Holies], and never without [animal] blood, which he offers [as a sacrifice] for himself and for the sins done in ignorance by the people.
Hebrews 10:10
By [Christ doing] what God wanted, we have been set aside for God through Jesus Christ offering His body once for all time.

As

Hebrews 9:12
And He did not enter [the heavenly Holy of Holies] by means of the blood of goats and calves but, by means of His own blood He entered the Holy of Holies [i.e., heaven] once for all time, [after] having obtained never ending redemption [i.e., salvation for us on the cross].