Hebrews 8:6

6But as it is, Christ
Greek he
has obtained a ministry that is bas much more excellent than the old as cthe covenant dhe mediates is better, since it is enacted on better promises.

Hebrews 9:15

15Therefore he is ethe mediator of a new covenant, so that fthose who are called may greceive the promised eternal inheritance, hsince a death has occurred that redeems them from the transgressions committed under the first covenant.
The Greek word means both  covenant and will; also verses 16, 17

Hebrews 12:24

24and to Jesus, jthe mediator of a new covenant, and to kthe sprinkled blood lthat speaks a better word than the blood of Abel.

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