Galatians 3:18

now if the right to the inheritance be from the law, it is no longer founded upon the promise; altho' God made a donation of it to Abraham by promise.

Luke 1:54-55

he has taken Israel his servant into his protection, in pursuance of the mercy,

Luke 1:72-73

to show regard to our forefathers, in performing his holy covenant,

Romans 4:13-16

Besides, the promise that he should possess the world, was not made to Abraham, or to his posterity in consideration of the law, but with regard to the righteousness by faith.

Romans 8:17

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

Galatians 2:21

I do not frustrate the grace of God: for if justification be by the law, Christ died to no purpose.

Galatians 3:10

but they that rest themselves upon the works of the law, are obnoxious to the curse: for it is written, " cursed is every one, who continueth not in all things, which are written in the book of the law, to do them:"

Galatians 3:12

now the law does not justify by FAITH, but says, "he that DOES these things shall live by them."

Galatians 3:16

now to Abraham and his offspring were the promises made. he does not say, "to offsprings," as if he spoke of many; but as speaking of one, "and to thy offspring," which means Christ.

Galatians 3:26

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

Galatians 3:29

and if you belong to Christ, you are Abraham's offspring, and his heirs by virtue of the promise.

Hebrews 6:12-15

but imitate the example of those who by faith and patience have obtain'd the inheritance that was promis'd to them.

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
but they that rest themselves upon the works of the law, are obnoxious to the curse: for it is written, " cursed is every one, who continueth not in all things, which are written in the book of the law, to do them:"
Galatians 2:21
I do not frustrate the grace of God: for if justification be by the law, Christ died to no purpose.
Romans 4:13
Besides, the promise that he should possess the world, was not made to Abraham, or to his posterity in consideration of the law, but with regard to the righteousness by faith.
Romans 8:17
and if children, then heirs; heirs of God, and joint-heirs with Christ; although we now suffer with him, that we may also be glorified with him.

But

Galatians 3:16
now to Abraham and his offspring were the promises made. he does not say, "to offsprings," as if he spoke of many; but as speaking of one, "and to thy offspring," which means Christ.
Luke 1:54
he has taken Israel his servant into his protection, in pursuance of the mercy,
Hebrews 6:12
but imitate the example of those who by faith and patience have obtain'd the inheritance that was promis'd to them.