Hebrews 8:6; Hebrews 9:15; Hebrews 12:24

Hebrews 8:6

6 But now He has obtained a more excellent ministry, by as much as He is also the mediator of a better covenant, which has been enacted on better promises.

Hebrews 9:15

15 For this reason He is the mediator of a new covenant, so that, since a death has taken place for the redemption of the transgressions that were committed under the first covenant, those who have been called may receive the promise of the eternal inheritance.

Hebrews 12:24

24 and to Jesus, the mediator of a new covenant, and to the sprinkled blood, which speaks better than the blood of Abel.