Romans 4:16

Because of this it is of faith, that it may be according to grace, for the promise being sure to all the seed, not to that which is of the law only, but also to that which is of the faith of Abraham,

Romans 9:8

that is, the children of the flesh -- these are not children of God; but the children of the promise are reckoned for seed;

Romans 15:8

And I say Jesus Christ to have become a ministrant of circumcision for the truth of God, to confirm the promises to the fathers,

Galatians 3:22

but the Writing did shut up the whole under sin, that the promise by faith of Jesus Christ may be given to those believing.

Isaiah 51:2

Look attentively unto Abraham your father, And unto Sarah -- she bringeth you forth, For -- one -- I have called him, And I bless him, and multiply him.

Romans 3:24-26

being declared righteous freely by His grace through the redemption that is in Christ Jesus,

Romans 4:11

and a sign he did receive of circumcision, a seal of the righteousness of the faith in the uncircumcision, for his being father of all those believing through uncircumcision, for the righteousness also being reckoned to them,

Romans 5:1

Having been declared righteous, then, by faith, we have peace toward God through our Lord Jesus Christ,

Galatians 3:7-12

know ye, then, that those of faith -- these are sons of Abraham,

Ephesians 2:5

even being dead in the trespasses, did make us to live together with the Christ, (by grace ye are having been saved,)

Ephesians 2:8

for by grace ye are having been saved, through faith, and this not of you -- of God the gift,

Titus 3:7

that having been declared righteous by His grace, heirs we may become according to the hope of life age-during.

Hebrews 6:13-19

For to Abraham God, having made promise, seeing He was able to swear by no greater, did swear by Himself,

2 Peter 1:10

wherefore, the rather, brethren, be diligent to make stedfast your calling and choice, for these things doing, ye may never stumble,

Treasury of Scripture Knowledge

Summary

Therefore it is of faith, that it might be by grace; to the end the promise might be sure to all the seed; not to that only which is of the law, but to that also which is of the faith of Abraham; who is the father of us all,

But to

The father

Bible References

Of faith

Romans 3:24
being declared righteous freely by His grace through the redemption that is in Christ Jesus,
Romans 5:1
Having been declared righteous, then, by faith, we have peace toward God through our Lord Jesus Christ,
Galatians 3:7
know ye, then, that those of faith -- these are sons of Abraham,
Ephesians 2:5
even being dead in the trespasses, did make us to live together with the Christ, (by grace ye are having been saved,)
Titus 3:7
that having been declared righteous by His grace, heirs we may become according to the hope of life age-during.

The promise

Hebrews 6:13
For to Abraham God, having made promise, seeing He was able to swear by no greater, did swear by Himself,
2 Peter 1:10
wherefore, the rather, brethren, be diligent to make stedfast your calling and choice, for these things doing, ye may never stumble,

But to

Romans 4:11
and a sign he did receive of circumcision, a seal of the righteousness of the faith in the uncircumcision, for his being father of all those believing through uncircumcision, for the righteousness also being reckoned to them,

The father

Romans 9:8
that is, the children of the flesh -- these are not children of God; but the children of the promise are reckoned for seed;
Isaiah 51:2
Look attentively unto Abraham your father, And unto Sarah -- she bringeth you forth, For -- one -- I have called him, And I bless him, and multiply him.

General references

Genesis 13:16
And I have set thy seed as dust of the earth, so that, if one is able to number the dust of the earth, even thy seed is numbered;
Luke 10:26
And he said unto him, 'In the law what hath been written? how dost thou read?'
Galatians 3:9
'Blessed in thee shall be all the nations;' so that those of faith are blessed with the faithful Abraham,
Galatians 4:28
And we, brethren, as Isaac, are children of promise,