Hebrews 8:7
For if the first covenant had been faultless, there could have been no room for a second one.
Hebrews 7:11
Now if perfection had been reached through the Levitical priesthood -- for on it as a basis even the law was enacted for the people-- what further need would there have been of appointing a different priest, with the rank of Melchizedek, instead of designating one with the rank of Aaron?
Hebrews 7:18
Indeed, the rescinding of a previous regulation takes place, because it was weak and ineffective --
Galatians 3:21
Is the law then contrary to God's promises? Of course not. For if a law had been given that was able to impart life, surely, then, right standing would have come through law.
Hebrews 8:6
But, as the case with Him now stands, He has entered upon a priestly service as much superior to theirs as the covenant of which He is the Mediator is superior to theirs, superior because it has been enacted upon superior promises.