Galatians 3:18

For if the inheritance be by law, it is no longer by promise: but God bestowed it on Abraham by promise.

Luke 1:54-55

He has helped Israel his servant, (as he spoke to our fathers,)

Luke 1:72-73

in order to show the mercy promised to our fathers, and to remember his holy covenant,

Romans 4:13-16

For the promise that he should be the heir of the world, was not to Abraham, nor to his posterity, through law, but through the righteousness of faith.

Romans 8:17

and, if children, then heirs; heirs of God, and joint-heirs with Christ, if indeed we suffer with him, that we may also be glorified together.

Galatians 2:21

I do not set aside the grace of God: for if righteousness be through law, then Christ has died in vain.

Galatians 3:10

For as many as are of the works of the law are under the curse: for it is written, Cursed is every one that does not continue in all things written in the book of the law to do them.

Galatians 3:12

The law, indeed, is not of faith; but he that does these things shall live by them.

Galatians 3:16

Now the promises were spoken to Abraham and to his offspring; he does not say: And to offsprings, as if he spoke of many; but as of one, And to your offspring, which is Christ.

Galatians 3:26

for you are all the sons of God, by faith in Christ Jesus:

Galatians 3:29

And if you are Christ s, then you are Abraham's posterity, and heirs according to the promise.

Hebrews 6:12-15

that you may not become slothful, but imitators of those who, through faith and patience, inherit the promises.

Treasury of Scripture Knowledge

Summary

For if the inheritance be of the law, it is no more of promise: but God gave it to Abraham by promise.

Bible References

If

Galatians 3:10
For as many as are of the works of the law are under the curse: for it is written, Cursed is every one that does not continue in all things written in the book of the law to do them.
Galatians 2:21
I do not set aside the grace of God: for if righteousness be through law, then Christ has died in vain.
Romans 4:13
For the promise that he should be the heir of the world, was not to Abraham, nor to his posterity, through law, but through the righteousness of faith.
Romans 8:17
and, if children, then heirs; heirs of God, and joint-heirs with Christ, if indeed we suffer with him, that we may also be glorified together.

But

Galatians 3:16
Now the promises were spoken to Abraham and to his offspring; he does not say: And to offsprings, as if he spoke of many; but as of one, And to your offspring, which is Christ.
Luke 1:54
He has helped Israel his servant, (as he spoke to our fathers,)
Hebrews 6:12
that you may not become slothful, but imitators of those who, through faith and patience, inherit the promises.