Romans 9:7

nor [are they] all children because they are descendants of Abraham, but "In Isaac will your descendants be named."

Genesis 21:12

Then God said to Abraham, "{Do not be displeased} on account of the boy and on account of the slave woman. {Listen to everything that Sarah said to you}, for through Isaac [your] offspring will be named.

Hebrews 11:18

with reference to whom it was said, "In Isaac your descendants will be named,"

Luke 3:8

Therefore produce fruit worthy of repentance! And do not begin to say to yourselves, 'We have Abraham [as] father.' For I say to you that God is able to raise up children for Abraham from these stones!

Luke 16:24-25

And he called out [and] said, 'Father Abraham, have mercy on me, and send Lazarus so that he could dip the tip of his finger in water and cool my tongue, because I am suffering pain in this flame!'

Luke 16:30

And he said, 'No, father Abraham, but if someone from the dead goes to them, they will repent!'

John 8:33

They replied to him, "We are descendants of Abraham and have not been enslaved to anyone at any time. How do you say, 'You will become free'?"

John 8:37-39

I know that you are descendants of Abraham. But you are seeking to kill me, because my word makes no progress among you.

Galatians 4:23

But the one by the female slave was born according to human descent, and the one by the free woman through the promise,

Philippians 3:3

For we are the circumcision, the ones who worship by the Spirit of God and boast in Christ Jesus and do not [put] confidence 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
Therefore produce fruit worthy of repentance! And do not begin to say to yourselves, 'We have Abraham [as] father.' For I say to you that God is able to raise up children for Abraham from these stones!
Luke 16:24
And he called out [and] said, 'Father Abraham, have mercy on me, and send Lazarus so that he could dip the tip of his finger in water and cool my tongue, because I am suffering pain in this flame!'
John 8:37
I know that you are descendants of Abraham. But you are seeking to kill me, because my word makes no progress among you.
Philippians 3:3
For we are the circumcision, the ones who worship by the Spirit of God and boast in Christ Jesus and do not [put] confidence in the flesh,

In isaac

Genesis 21:12
Then God said to Abraham, "{Do not be displeased} on account of the boy and on account of the slave woman. {Listen to everything that Sarah said to you}, for through Isaac [your] offspring will be named.
Hebrews 11:18
with reference to whom it was said, "In Isaac your descendants will be named,"

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 he had to Isaac.