Romans 9:7

Neither that the seed of Abraham, are all children: but, In Isaac shall the seed be called to thee.

Genesis 21:12

And God will say to Abraham, It shall not be evil in thine eyes concerning the boy, and concerning thy maidservant; all which Sarah shall say to thee, hear to her voice; for in Isaak the seed shall be called to thee.

Hebrews 11:18

To whom it was spoken, That in Isaac shall seed be called to thee:

Luke 3:8

Do ye therefore fruits worthy of repentance, and begin not to, say in yourselves, We have a father A braham : for I say to you, That God is able to raise children to Abraham of these stones.

Luke 16:24-25

And he having called out, said, Father Abraham, pity me, and send Lazarus, that he might dip his finger in water, and cool my tongue; for I am tormented in this flame.

Luke 16:30

And he said, Nay, father Abraham: but if some one from the dead go to them, they will change the mind.

John 8:33

They answered him, We are Abraham's seed, and have never served any; how sayest thou, That ye shall be free?

John 8:37-39

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

Galatians 4:23

But he truly of the bondmaid was born according to the flesh; and he of the free through the promise.

Philippians 3:3

For we are the circumcision, serving God in spirit, and boasting in Christ Jesus, and not trusting in the 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
Do ye therefore fruits worthy of repentance, and begin not to, say in yourselves, We have a father A braham : for I say to you, That God is able to raise children to Abraham of these stones.
Luke 16:24
And he having called out, said, Father Abraham, pity me, and send Lazarus, that he might dip his finger in water, and cool my tongue; for I am tormented in this flame.
John 8:37
I know that ye are Abraham's seed; but ye seek to kill me, for my word has no place in you.
Philippians 3:3
For we are the circumcision, serving God in spirit, and boasting in Christ Jesus, and not trusting in the flesh.

In isaac

Genesis 21:12
And God will say to Abraham, It shall not be evil in thine eyes concerning the boy, and concerning thy maidservant; all which Sarah shall say to thee, hear to her voice; for in Isaak the seed shall be called to thee.
Hebrews 11:18
To whom it was spoken, That in Isaac shall seed be called to thee:

General references

Genesis 21:3
And Abraham shall call the name of his son being born to him, whom Sarah will bear to him, Isaak.
Genesis 25:5
And Abraham will give all which is to him to Isaak.