Hebrews 8:6

Overview - Hebrews 8
By the eternal priesthood of Christ the Levitical priesthood of Aaron is abolished;
and the temporal covenant with the fathers, by the eternal covenant of the Gospel.
Treasury of Scripture Knowledge

Hebrews 8:6  (King James Version)
But now hath he obtained a more excellent ministry, by how much also he is the mediator of a better covenant, which was established upon better promises.

7-13 2Co 3:6-11

the mediator
7:22 12:24 Galatians 3:19 Galatians 3:20

or, testament.
7:22 9:15-20

was established
[Nomotheteo ,] "was ordained (or established) by law."

8:10-12 Romans 9:4 ; Galatians 3:16-21 ; Titus 1:2 ; 2 Peter 1:4