Hebrews 7:22

so much the more also is the Covenant of which Jesus has become the guarantor, a better covenant.

Matthew 26:28

for this is my blood which is to be poured out for many for the remission of sins--the blood which ratifies the Covenant.

Mark 14:24

"This is my blood," He said, "which is to be poured out on behalf of many--the blood which makes the Covenant sure.

Luke 22:20

He gave them the cup in like manner, when the meal was over. "This cup," He said, "is the new Covenant ratified by my blood which is to be poured out on your behalf.

1 Corinthians 11:25

In the same way, when the meal was over, He also took the cup. "This cup," He said, "is the new Covenant of which my blood is the pledge. Do this, every time that you drink it, in memory of me."

Hebrews 8:6-12

But, as a matter of fact, the ministry which Christ has obtained is all the nobler a ministry, in that He is at the same time the negotiator of a sublimer covenant, based upon sublimer promises.

Hebrews 9:15-23

And because of this He is the negotiator of a new Covenant, in order that, since a life has been given in atonement for the offences committed under the first Covenant, those who have been called may receive the eternal inheritance which has been promised to them.

Hebrews 12:24

and to Jesus the negotiator of a new Covenant, and to the sprinkled blood which speaks in more gracious tones than that of Abel.

Hebrews 13:20

Now may God who gives peace, and brought Jesus, our Lord, up again from among the dead--even Him who, by virtue of the blood of the eternal Covenant, is the great Shepherd of the sheep--

Treasury of Scripture Knowledge

Summary

By so much was Jesus made a surety of a better testament.

Bible References

Of a

Hebrews 8:6
But, as a matter of fact, the ministry which Christ has obtained is all the nobler a ministry, in that He is at the same time the negotiator of a sublimer covenant, based upon sublimer promises.
Hebrews 9:15
And because of this He is the negotiator of a new Covenant, in order that, since a life has been given in atonement for the offences committed under the first Covenant, those who have been called may receive the eternal inheritance which has been promised to them.
Hebrews 12:24
and to Jesus the negotiator of a new Covenant, and to the sprinkled blood which speaks in more gracious tones than that of Abel.
Hebrews 13:20
Now may God who gives peace, and brought Jesus, our Lord, up again from among the dead--even Him who, by virtue of the blood of the eternal Covenant, is the great Shepherd of the sheep--
Matthew 26:28
for this is my blood which is to be poured out for many for the remission of sins--the blood which ratifies the Covenant.
Mark 14:24
"This is my blood," He said, "which is to be poured out on behalf of many--the blood which makes the Covenant sure.
Luke 22:20
He gave them the cup in like manner, when the meal was over. "This cup," He said, "is the new Covenant ratified by my blood which is to be poured out on your behalf.
1 Corinthians 11:25
In the same way, when the meal was over, He also took the cup. "This cup," He said, "is the new Covenant of which my blood is the pledge. Do this, every time that you drink it, in memory of me."