Hebrews 8:7

For if that first covenant had been faultless, then a place would not have been sought for a second.

Hebrews 7:11

If indeed perfection had been by the Levitical priesthood, (for under it the people hath received the Law,) what further need was there that a different priest should arise after the order of Melchizedek, and not be called alter the order of Aaron?

Hebrews 7:18

For on the one hand there takes place an annulling of the commandment which went before, on account of its weakness and unprofitableness,

Galatians 3:21

Is then the Law against the promises of God? Far be it! For if a law had been given which was able to give life, righteousness would indeed have been by the Law;

Hebrews 8:6

But now he hath obtained a more excellent ministry, in proportion as he is the mediator of a better covenant, which hath been established upon better promises.

Treasury of Scripture Knowledge

Summary

For if that first covenant had been faultless, then should no place have been sought for the second.

Bible References

Had

Hebrews 8:6
But now he hath obtained a more excellent ministry, in proportion as he is the mediator of a better covenant, which hath been established upon better promises.
Hebrews 7:11
If indeed perfection had been by the Levitical priesthood, (for under it the people hath received the Law,) what further need was there that a different priest should arise after the order of Melchizedek, and not be called alter the order of Aaron?
Galatians 3:21
Is then the Law against the promises of God? Far be it! For if a law had been given which was able to give life, righteousness would indeed have been by the Law;