Romans 9:7

Neither are they all children because they are Abraham’s descendants. On the contrary, your offspring will be traced through Isaac.

Genesis 21:12

But God said to Abraham, “Do not be concerned about the boy and your slave. Whatever Sarah says to you, listen to her, because your offspring will be traced through Isaac.

Hebrews 11:18

the one it had been said about, Your seed will be traced through Isaac.

Luke 3:8

Therefore produce fruit consistent with repentance. And don’t start saying to yourselves, ‘We have Abraham as our father,’ for I tell you that God is able to raise up children for Abraham from these stones!

Luke 16:24-25

‘Father Abraham!’ he called out, ‘Have mercy on me and send Lazarus to dip the tip of his finger in water and cool my tongue, because I am in agony in this flame!’

Luke 16:30

“‘No, father Abraham,’ he said. ‘But if someone from the dead goes to them, they will repent.’

John 8:33

“We are descendants of Abraham,” they answered Him, “and we have never been enslaved to anyone. How can You say, ‘You will become free’?”

John 8:37-39

I know you are descendants of Abraham, but you are trying to kill Me because My word is not welcome among you.

Galatians 4:23

But the one by the slave was born according to the impulse of the flesh, while the one by the free woman was born as the result of a promise.

Philippians 3:3

For we are the circumcision, the ones who serve by the Spirit of God, 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 consistent with repentance. And don’t start saying to yourselves, ‘We have Abraham as our father,’ for I tell you that God is able to raise up children for Abraham from these stones!
Luke 16:24
‘Father Abraham!’ he called out, ‘Have mercy on me and send Lazarus to dip the tip of his finger in water and cool my tongue, because I am in agony in this flame!’
John 8:37
I know you are descendants of Abraham, but you are trying to kill Me because My word is not welcome among you.
Philippians 3:3
For we are the circumcision, the ones who serve by the Spirit of God, boast in Christ Jesus, and do not put confidence in the flesh—

In isaac

Genesis 21:12
But God said to Abraham, “Do not be concerned about the boy and your slave. Whatever Sarah says to you, listen to her, because your offspring will be traced through Isaac.
Hebrews 11:18
the one it had been said about, Your seed will be traced through Isaac.

General references

Genesis 21:3
Abraham named his son who was born to him—the one Sarah bore to him—Isaac.
Genesis 25:5
Abraham gave everything he owned to Isaac.

Holman Christian Standard Bible®, Copyright © 1999, 2000, 2002, 2003, 2009 by Holman Bible Publishers.