Romans 9:7

nor because they are seed of Abraham are all children: but, In Isaac shall a seed be called to thee.

Genesis 21:12

And God said to Abraham, Let it not be grievous in thy sight because of the lad and because of thy handmaid: in all that Sarah hath said to thee hearken to her voice, for in Isaac shall a seed be called to thee.

Hebrews 11:18

as to whom it had been said, In Isaac shall thy seed be called:

Luke 3:8

Produce therefore fruits worthy of repentance; and begin not to say in yourselves, We have Abraham for our father, for I say unto you that God is able of these stones to raise up children to Abraham.

Luke 16:24-25

And he crying out said, Father Abraham, have compassion on me, and send Lazarus that he may dip the tip of his finger in water and cool my tongue, for I am suffering in this flame.

Luke 16:30

But he said, Nay, father Abraham, but if one from the dead should go to them, they will repent.

John 8:33

They answered him, We are Abraham's seed, and have never been under bondage to any one; how sayest thou, Ye shall become free?

John 8:37-39

I know that ye are Abraham's seed; but ye seek to kill me, because my word has no entrance in you.

Galatians 4:23

But he that was of the maid servant was born according to flesh, and he that was of the free woman through the promise.

Philippians 3:3

For we are the circumcision, who worship by the Spirit of God, and boast in Christ Jesus, and do not trust in flesh.

Treasury of Scripture Knowledge

Summary

Neither, because they are the seed of Abraham, are they all children: but, In Isaac shall thy seed be called.

General references

Bible References

Because

Luke 3:8
Produce therefore fruits worthy of repentance; and begin not to say in yourselves, We have Abraham for our father, for I say unto you that God is able of these stones to raise up children to Abraham.
Luke 16:24
And he crying out said, Father Abraham, have compassion on me, and send Lazarus that he may dip the tip of his finger in water and cool my tongue, for I am suffering in this flame.
John 8:37
I know that ye are Abraham's seed; but ye seek to kill me, because my word has no entrance in you.
Philippians 3:3
For we are the circumcision, who worship by the Spirit of God, and boast in Christ Jesus, and do not trust in flesh.

In isaac

Genesis 21:12
And God said to Abraham, Let it not be grievous in thy sight because of the lad and because of thy handmaid: in all that Sarah hath said to thee hearken to her voice, for in Isaac shall a seed be called to thee.
Hebrews 11:18
as to whom it had been said, In Isaac shall thy seed be called:

General references

Genesis 21:3
And Abraham called the name of his son who was born to him, whom Sarah bore to him, Isaac.
Genesis 25:5
And Abraham gave all that he had to Isaac.